A010716 -id:A010716 - cp's OEIS frontend

A195151 Square array read by antidiagonals upwards: T(n,k) = n((k-2)(-1)^n+k+2)/4, n >= 0, k >= 0.

0, 1, 0, 0, 1, 0, 3, 1, 1, 0, 0, 3, 2, 1, 0, 5, 2, 3, 3, 1, 0, 0, 5, 4, 3, 4, 1, 0, 7, 3, 5, 6, 3, 5, 1, 0, 0, 7, 6, 5, 8, 3, 6, 1, 0, 9, 4, 7, 9, 5, 10, 3, 7, 1, 0, 0, 9, 8, 7, 12, 5, 12, 3, 8, 1, 0, 11, 5, 9, 12, 7, 15, 5, 14, 3, 9, 1, 0, 0, 11, 10, 9, 16, 7

Offset: 0

Omar E. Pol, Sep 14 2011

Also square array T(n,k) read by antidiagonals in which column k lists the multiples of k and the odd numbers interleaved, n>=0, k>=0. Also square array T(n,k) read by antidiagonals in which if n is even then row n lists the multiples of (n/2), otherwise if n is odd then row n lists a constant sequence: the all n's sequence. Partial sums of the numbers of column k give the column k of A195152. Note that if k >= 1 then partial sums of the numbers of the column k give the generalized m-gonal numbers, where m = k + 4.

All columns are multiplicative. - Andrew Howroyd, Jul 23 2018

			Array begins:
.  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,...
.  1,   1,   1,   1,   1,   1,   1,   1,   1,   1,...
.  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,...
.  3,   3,   3,   3,   3,   3,   3,   3,   3,   3,...
.  0,   2,   4,   6,   8,  10,  12,  14,  16,  18,...
.  5,   5,   5,   5,   5,   5,   5,   5,   5,   5,...
.  0,   3,   6,   9,  12,  15,  18,  21,  24,  27,...
.  7,   7,   7,   7,   7,   7,   7,   7,   7,   7,...
.  0,   4,   8,  12,  16,  20,  24,  28,  32,  36,...
.  9,   9,   9,   9,   9,   9,   9,   9,   9,   9,...
.  0,   5,  10,  15,  20,  25,  30,  35,  40,  45,...
...

Rows: A000004, A000012, A001477, A010701, A005843, A010716, A008585, A010727, A008586, A010734, A008587.

Columns k: A026741 (k=1), A001477 (k=2), zero together with A080512 (k=3), A022998 (k=4), A195140 (k=5), zero together with A165998 (k=6), A195159 (k=7), A195161 (k=8), A195312 k=(9), A195817 (k=10), A317311 (k=11), A317312 (k=12), A317313 (k=13), A317314 k=(14), A317315 (k=15), A317316 (k=16), A317317 (k=17), A317318 (k=18), A317319 k=(19), A317320 (k=20), A317321 (k=21), A317322 (k=22), A317323 (k=23), A317324 k=(24), A317325 (k=25), A317326 (k=26).

T(n,k) = n*((k-2)*(-1)^n+k+2)/4 \\ Andrew Howroyd, Jul 23 2018

A010722 Constant sequence: the all 6's sequence.

Original entry on oeis.org

6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6

Offset: 0

N. J. A. Sloane

Continued fraction expansion of 3+sqrt(10). - Bruno Berselli, Mar 15 2011
Decimal expansion of Sum_{n >= 0} n/binomial(2*n+1, n) = 2/3. - Bruno Berselli, Sep 14 2015
Decimal expansion of 2/3. - Franklin T. Adams-Watters, Feb 23 2019

John H. Conway and Richard K. Guy, The Book of Numbers, New York: Springer-Verlag, 1996. See p. 81.
David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1987, p. 29.

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 1014.
Tanya Khovanova, Recursive Sequences.
Index to divisibility sequences.
Index entries for linear recurrences with constant coefficients, signature (1).

Cf. A145429: decimal expansion of Sum_{n >= 0} n/binomial(2*n, n).
Cf. A000012, A007395, A010701, A010709, A010716.
First differences of A008588.

a(n)=6 \\ Charles R Greathouse IV, Sep 28 2015

G.f.: 6/(1-x). - Bruno Berselli, Mar 15 2011
E.g.f.: 6*e^x. - Vincenzo Librandi, Jan 27 2012
a(n) = floor(1/(-n + csc(1/n))). - Clark Kimberling, Mar 10 2020

A372274 Decimal expansion of the smallest positive zero of the Legendre polynomial of degree 7.

Original entry on oeis.org

4, 0, 5, 8, 4, 5, 1, 5, 1, 3, 7, 7, 3, 9, 7, 1, 6, 6, 9, 0, 6, 6, 0, 6, 4, 1, 2, 0, 7, 6, 9, 6, 1, 4, 6, 3, 3, 4, 7, 3, 8, 2, 0, 1, 4, 0, 9, 9, 3, 7, 0, 1, 2, 6, 3, 8, 7, 0, 4, 3, 2, 5, 1, 7, 9, 4, 6, 6, 3, 8, 1, 3, 2, 2, 6, 1, 2, 5, 6, 5, 5, 3, 2, 8, 3, 1, 2

Offset: 0

Pontus von Brömssen, Apr 25 2024

			0.405845151377397166906606412076961463347382014099370126387043...

Paolo Xausa, Table of n, a(n) for n = 0..10000
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy]. Table 25.4, n=7.
A.H.M. Smeets, Python program for Legendre-Gauss quadrature constants.
Eric Weisstein's World of Mathematics, Legendre Polynomial.
Eric Weisstein's World of Mathematics, Legendre-Gauss Quadrature.
Wikipedia, Legendre polynomials.
Index entries for algebraic numbers, degree 6.

Cf. A008316, A100258.
There are floor(k/2) positive zeros of the Legendre polynomial of degree k:
   k | zeros                           | corresponding weights for Legendre-Gauss quadrature
  ---+---------------------------------+----------------------------------------------------
   2 | A020760                         | A000007*10
   3 | A010513/10                      | A010716
   4 | A372267, A372268                | A382103, A382104
   5 | A372269, A372270                | A382105, A382106
   6 | A372271, A372272, A372273       | A382107, A382686, A382687
   7 | this sequence, A372275, A372276 | A382688, A382689, A382690

First[RealDigits[Root[LegendreP[7, #] &, 5], 10, 100]] (* Paolo Xausa, Feb 27 2025 *)

solve (x = 0.1, 0.5, 429*x^6 - 693*x^4 + 315*x^2 - 35) \\ A.H.M. Smeets, May 31 2025

Smallest positive root of 429*x^6 - 693*x^4 + 315*x^2 - 35 = 0.

A372275 Decimal expansion of the middle positive zero of the Legendre polynomial of degree 7.

Original entry on oeis.org

7, 4, 1, 5, 3, 1, 1, 8, 5, 5, 9, 9, 3, 9, 4, 4, 3, 9, 8, 6, 3, 8, 6, 4, 7, 7, 3, 2, 8, 0, 7, 8, 8, 4, 0, 7, 0, 7, 4, 1, 4, 7, 6, 4, 7, 1, 4, 1, 3, 9, 0, 2, 6, 0, 1, 1, 9, 9, 5, 5, 3, 5, 1, 9, 6, 7, 4, 2, 9, 8, 7, 4, 6, 7, 2, 1, 8, 0, 5, 1, 3, 7, 9, 2, 8, 2, 6

Offset: 0

Pontus von Brömssen, Apr 25 2024

			0.741531185599394439863864773280788407074147647141390260119955...

Paolo Xausa, Table of n, a(n) for n = 0..10000
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy]. Table 25.4, n=7.
A.H.M. Smeets, Python program for Legendre-Gauss quadrature constants.
Eric Weisstein's World of Mathematics, Legendre Polynomial.
Eric Weisstein's World of Mathematics, Legendre-Gauss Quadrature.
Wikipedia, Legendre polynomials.
Index entries for algebraic numbers, degree 6.

Cf. A008316, A100258.
There are floor(k/2) positive zeros of the Legendre polynomial of degree k:
   k | zeros                           | corresponding weights for Legendre-Gauss quadrature
  ---+---------------------------------+----------------------------------------------------
   2 | A020760                         | A000007*10
   3 | A010513/10                      | A010716
   4 | A372267, A372268                | A382103, A382104
   5 | A372269, A372270                | A382105, A382106
   6 | A372271, A372272, A372273       | A382107, A382686, A382687
   7 | A372274, this sequence, A372276 | A382688, A382689, A382690

First[RealDigits[Root[LegendreP[7, #] &, 6], 10, 100]] (* Paolo Xausa, Feb 27 2025 *)

solve (x = 0.6, 0.8, 429*x^6 - 693*x^4 + 315*x^2 - 35) \\ A.H.M. Smeets, May 31 2025

Middle positive root of 429*x^6 - 693*x^4 + 315*x^2 - 35 = 0.

A372276 Decimal expansion of the largest positive zero of the Legendre polynomial of degree 7.

Original entry on oeis.org

9, 4, 9, 1, 0, 7, 9, 1, 2, 3, 4, 2, 7, 5, 8, 5, 2, 4, 5, 2, 6, 1, 8, 9, 6, 8, 4, 0, 4, 7, 8, 5, 1, 2, 6, 2, 4, 0, 0, 7, 7, 0, 9, 3, 7, 6, 7, 0, 6, 1, 7, 7, 8, 3, 5, 4, 8, 7, 6, 9, 1, 0, 3, 9, 1, 3, 0, 6, 3, 3, 3, 0, 3, 5, 4, 8, 4, 0, 1, 4, 0, 8, 0, 5, 7, 3, 0

Offset: 0

Pontus von Brömssen, Apr 25 2024

			0.949107912342758524526189684047851262400770937670617783548769...

Paolo Xausa, Table of n, a(n) for n = 0..10000
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy]. Table 25.4, n=7.
A.H.M. Smeets, Python program for Legendre-Gauss quadrature constants.
Eric Weisstein's World of Mathematics, Legendre Polynomial.
Eric Weisstein's World of Mathematics, Legendre-Gauss Quadrature.
Wikipedia, Legendre polynomials.
Index entries for algebraic numbers, degree 6.

Cf. A008316, A100258.
There are floor(k/2) positive zeros of the Legendre polynomial of degree k:
   k | zeros                           | corresponding weights for Legendre-Gauss quadrature
  ---+---------------------------------+----------------------------------------------------
   2 | A020760                         | A000007*10
   3 | A010513/10                      | A010716
   4 | A372267, A372268                | A382103, A382104
   5 | A372269, A372270                | A382105, A382106
   6 | A372271, A372272, A372273       | A382107, A382686, A382687
   7 | A372274, A372275, this sequence | A382688, A382689, A382690

First[RealDigits[Root[LegendreP[7, #] &, 7], 10, 100]] (* Paolo Xausa, Feb 27 2025 *)

solve (x = 0.8, 1.0, 429*x^6 - 693*x^4 + 315*x^ - 35) \\ A.H.M. Smeets, May 31 2025

Largest positive root of 429*x^6 - 693*x^4 + 315*x^2 - 35 = 0.

A098318 Decimal expansion of [5, 5, ...] = (5 + sqrt(29))/2.

Original entry on oeis.org

5, 1, 9, 2, 5, 8, 2, 4, 0, 3, 5, 6, 7, 2, 5, 2, 0, 1, 5, 6, 2, 5, 3, 5, 5, 2, 4, 5, 7, 7, 0, 1, 6, 4, 7, 7, 8, 1, 4, 7, 5, 6, 0, 0, 8, 0, 8, 2, 2, 3, 9, 4, 4, 1, 8, 8, 4, 0, 1, 9, 4, 3, 3, 5, 0, 0, 8, 3, 2, 2, 9, 8, 1, 4, 1, 3, 8, 2, 9, 3, 4, 6, 4, 3, 8, 3, 1, 6, 8, 9, 0, 8, 3, 9, 9, 1, 7, 7, 4, 2, 2, 0

Offset: 1

Eric W. Weisstein, Sep 02 2004

The "metallic" constants A001622, A014176 etc. are defined inserting a = 1, 2, 3, 4, ... into (a+sqrt(a^2+4))/2. [Stakhov & Aranson] - R. J. Mathar, Feb 14 2011

This is the length/width ratio of a 5-extension rectangle; see A188640 where the metallic constants are defined for rational numbers. - Clark Kimberling, Apr 09 2011

			5.19258240356725201562535524577016477814756...

G. C. Greubel, Table of n, a(n) for n = 1..10000
A. Stakhov and Samuil Aranson, Hyperbolic Fibonacci and Lucas functions, Golden Fibonacci Goniometry, Bodnar's Geometry, ..., Appl. Math. 2 (1) (2011) 74-84.
Wikipedia, Metallic mean
Index entries for algebraic numbers, degree 2

Cf. A001622, A014176, A098316, A098317, A010716 (continued fraction).

Cf. A052918, A049310.

SetDefaultRealField(RealField(100)); (5 + Sqrt(29))/2; // G. C. Greubel, Jun 30 2019

r=5; t=(r+(4+r^2)^(1/2))/2; FullSimplify[t]
N[t,130]
RealDigits[N[t,130]][[1]]
ContinuedFraction[t,120] (* Clark Kimberling, Apr 09 2011 *)

(5 + sqrt(29))/2 \\ Charles R Greathouse IV, Jul 24 2013

numerical_approx((5+sqrt(29))/2, digits=100) # G. C. Greubel, Jun 30 2019

5 plus the constant in A085551. - R. J. Mathar, Sep 02 2008
c^n = A052918(n-2) + A052918(n-1) * c, where c = (5 + sqrt(29))/2. - Gary W. Adamson, Oct 09 2023
Equals lim_{n->infinity} S(n, sqrt(29))/ S(n-1, sqrt(29)), with the S-Chebyshev polynomials (see A049310). - Wolfdieter Lang, Nov 15 2023

A144180 Number of ways of placing n labeled balls into n unlabeled (but 5-colored) boxes.

Original entry on oeis.org

1, 5, 30, 205, 1555, 12880, 115155, 1101705, 11202680, 120415755, 1362057155, 16151603830, 200144023805, 2584429030505, 34691478901030, 483040313859705, 6963313750468055, 103747357497925880, 1595132080103893655

Offset: 0

Philippe Deléham, Sep 12 2008

nonn

a(n) is also the exp transform of A010716. - Alois P. Heinz, Oct 09 2008

The number of ways of putting n labeled balls into a set of bags and then putting the bags into 5 labeled boxes. - Peter Bala, Mar 23 2013

Alois P. Heinz, Table of n, a(n) for n = 0..200
H. D. Nguyen, D. Taggart, Mining the OEIS: Ten Experimental Conjectures, 2013; Mentions this sequence. - From _N. J. A. Sloane_, Mar 16 2014
N. J. A. Sloane, Transforms

Cf. A000110, A001861, A027710, A078944. A144223, A144263, A189233, A221159, A221176.

a:= proc(n) option remember; `if`(n=0, 1,
      (1+add(binomial(n-1, k-1)*a(n-k), k=1..n-1))*5)
    end:
seq(a(n), n=0..25); # Alois P. Heinz, Oct 09 2008

Table[BellB[n,5],{n,0,20}] (* Vaclav Kotesovec, Mar 12 2014 *)

expnums(19, 5) # Zerinvary Lajos, May 15 2009

a(n) = Sum_{k=0..n} 5^k * A048993(n,k); A048993: Stirling2 numbers.
G.f.: A(x) satisfies 5*(x/(1-x))*A(x/(1-x)) = A(x)-1; five times the binomial transform equals this sequence shifted one place left.
E.g.f.: exp(5*(exp(x)-1)).
G.f.: (G(0) - 1)/(x-1)/5 where G(k) =  1 - 5/(1-k*x)/(1-x/(x-1/G(k+1) )); (recursively defined continued fraction). - Sergei N. Gladkovskii, Jan 16 2013
a(n) ~ n^n * exp(n/LambertW(n/5)-5-n) / (sqrt(1+LambertW(n/5)) * LambertW(n/5)^n). - Vaclav Kotesovec, Mar 12 2014
G.f.: Sum_{j>=0} 5^j*x^j / Product_{k=1..j} (1 - k*x). - Ilya Gutkovskiy, Apr 07 2019

More terms from Alois P. Heinz, Oct 09 2008

A048487 a(n) = T(4,n), array T given by A048483.

Original entry on oeis.org

1, 6, 16, 36, 76, 156, 316, 636, 1276, 2556, 5116, 10236, 20476, 40956, 81916, 163836, 327676, 655356, 1310716, 2621436, 5242876, 10485756, 20971516, 41943036, 83886076, 167772156, 335544316, 671088636, 1342177276, 2684354556, 5368709116, 10737418236, 21474836476

Offset: 0

Clark Kimberling

Row sums of triangle A131113. - Gary W. Adamson, Jun 15 2007
a(n) = sum of (n+1)-th row terms of triangle A134636. This sequence is the binomial transform of 1, 5, 5, (5 continued). - Gary W. Adamson, Nov 04 2007
Row sums of triangle A135856. - Gary W. Adamson, Dec 01 2007

Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (3,-2).

Cf. A010716 (n-th difference of a(n), a(n-1), ..., a(0)).
Diagonal of A062001.
A column of A119726.
Cf. A048483, A123208, A131113, A134636, A135856.

[5*2^n-4: n in [0..30]]; // Vincenzo Librandi, Sep 23 2011

a=1; lst={a}; k=5; Do[a+=k; AppendTo[lst, a]; k+=k, {n, 0, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, Dec 15 2008 *)
a=6; lst={1, a}; k=10; Do[a+=k; AppendTo[lst, a]; k+=k, {n, 0, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, Dec 17 2008 *)

a(n) = 5*2^n - 4. - Henry Bottomley, May 29 2001
a(n) = 2*a(n-1) + 4 for n > 0 with a(0) = 1. - Paul Barry, Aug 25 2004
From Colin Barker, Sep 13 2012: (Start)
a(n) = 3*a(n-1) - 2*a(n-2) for n >= 2.
G.f.: (1 + 3*x)/((1 - x)*(1 - 2*x)). (End)
a(n) = A123208(2*n). - Philippe Deléham, Apr 15 2013
E.g.f.: exp(x)*(5*exp(x) - 4). -  Stefano Spezia, Oct 03 2023

A382103 Decimal expansion of the weight factor for Legendre-Gauss quadrature corresponding to abscissa A372267.

Original entry on oeis.org

3, 4, 7, 8, 5, 4, 8, 4, 5, 1, 3, 7, 4, 5, 3, 8, 5, 7, 3, 7, 3, 0, 6, 3, 9, 4, 9, 2, 2, 1, 9, 9, 9, 4, 0, 7, 2, 3, 5, 3, 4, 8, 6, 9, 5, 8, 3, 3, 8, 9, 3, 5, 4, 0, 4, 9, 2, 5, 2, 9, 3, 1, 9, 5, 1, 8, 7, 5, 1, 8, 6, 7, 4, 6, 5, 9, 1, 0, 3, 5, 1, 7, 2, 1, 9, 8, 3

Offset: 0

A.H.M. Smeets, Mar 15 2025

There are floor(k/2) positive zeros of the Legendre polynomial of degree k:
   k | zeros                     | corresponding weights for Legendre-Gauss quadrature
  ---+---------------------------+----------------------------------------------------
   2 | A020760                   | A000007*10
   3 | A010513/10                | A010716
   4 | A372267, A372268          | this sequence, A382104
   5 | A372269, A372270          | A382105, A382106
   6 | A372271, A372272, A372273 | A382107, A382686, A382687
   7 | A372274, A372275, A372276 | A382688, A382689, A382690

			0.34785484513745385737306394922199940723534869583389...

A.H.M. Smeets, Table of n, a(n) for n = 0..10000
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy]. Table 25.4, n=4.
A.H.M. Smeets, Python program for Legendre-Gauss quadrature constants.
Eric Weisstein's World of Mathematics, Legendre-Gauss Quadrature.

Cf. A372267.

RealDigits[1/2 - Sqrt[5/6]/6, 10, 120][[1]] (* Amiram Eldar, Mar 24 2025 *)

Equals 1/2 - (1/6)*sqrt(5/6).

A382104 Decimal expansion of the weight factor for Legendre-Gauss quadrature corresponding to abscissa A372268.

Original entry on oeis.org

6, 5, 2, 1, 4, 5, 1, 5, 4, 8, 6, 2, 5, 4, 6, 1, 4, 2, 6, 2, 6, 9, 3, 6, 0, 5, 0, 7, 7, 8, 0, 0, 0, 5, 9, 2, 7, 6, 4, 6, 5, 1, 3, 0, 4, 1, 6, 6, 1, 0, 6, 4, 5, 9, 5, 0, 7, 4, 7, 0, 6, 8, 0, 4, 8, 1, 2, 4, 8, 1, 3, 2, 5, 3, 4, 0, 8, 9, 6, 4, 8, 2, 7, 8, 0, 1, 6

Offset: 0

A.H.M. Smeets, Mar 15 2025

There are floor(k/2) positive zeros of the Legendre polynomial of degree k:
   k | zeros                     | corresponding weights for Legendre-Gauss quadrature
  ---+---------------------------+----------------------------------------------------
   2 | A020760                   | A000007*10
   3 | A010513/10                | A010716
   4 | A372267, A372268          | A382103, this sequence
   5 | A372269, A372270          | A382105, A382106
   6 | A372271, A372272, A372273 | A382107, A382686, A382687
   7 | A372274, A372275, A372276 | A382688, A382689, A382690

			0.65214515486254614262693605077800059276465130416610645...

A.H.M. Smeets, Table of n, a(n) for n = 0..10000
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy]. Table 25.4, n=4.
A.H.M. Smeets, Python program for Legendre-Gauss quadrature constants.
Eric Weisstein's World of Mathematics, Legendre-Gauss Quadrature.

Cf. A372268.

RealDigits[1/2 + Sqrt[5/6]/6, 10, 120][[1]] (* Amiram Eldar, Mar 24 2025 *)

1/2 + (1/6)*sqrt(5/6) \\ Stefano Spezia, May 22 2025

Equals 1/2 + (1/6)*sqrt(5/6).

Minimal polynomial: 216*x^2 - 216*x + 49. - Stefano Spezia, May 22 2025

cp's OEIS Frontend

A195151 Square array read by antidiagonals upwards: T(n,k) = n*((k-2)*(-1)^n+k+2)/4, n >= 0, k >= 0.

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A010722 Constant sequence: the all 6's sequence.

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A372274 Decimal expansion of the smallest positive zero of the Legendre polynomial of degree 7.

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A372275 Decimal expansion of the middle positive zero of the Legendre polynomial of degree 7.

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A372276 Decimal expansion of the largest positive zero of the Legendre polynomial of degree 7.

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A098318 Decimal expansion of [5, 5, ...] = (5 + sqrt(29))/2.

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A144180 Number of ways of placing n labeled balls into n unlabeled (but 5-colored) boxes.

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A195151 Square array read by antidiagonals upwards: T(n,k) = n((k-2)(-1)^n+k+2)/4, n >= 0, k >= 0.