cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-3 of 3 results.

A057075 Table read by antidiagonals of T(n,k)=floor(n^n/k) with n,k >= 1.

Original entry on oeis.org

1, 0, 4, 0, 2, 27, 0, 1, 13, 256, 0, 1, 9, 128, 3125, 0, 0, 6, 85, 1562, 46656, 0, 0, 5, 64, 1041, 23328, 823543, 0, 0, 4, 51, 781, 15552, 411771, 16777216, 0, 0, 3, 42, 625, 11664, 274514, 8388608, 387420489, 0, 0, 3, 36, 520, 9331, 205885, 5592405, 193710244, 10000000000
Offset: 1

Views

Author

Henry Bottomley, Jul 31 2000

Keywords

Examples

			From _Seiichi Manyama_, Aug 12 2023: (Start)
Square array begins:
      1,     0,     0,     0,    0,    0, ...
      4,     2,     1,     1,    0,    0, ...
     27,    13,     9,     6,    5,    4, ...
    256,   128,    85,    64,   51,   42, ...
   3125,  1562,  1041,   781,  625,  520, ...
  46656, 23328, 15552, 11664, 9331, 7776, ... (End)
		

Crossrefs

Rows are: A000007 (essentially), A033324, A033347, A057066-A057074.
Columns include A000312 and A057065.
Leading diagonal is A000169.
Cf. A060155.

Programs

A060154 Table T(n,k) by antidiagonals of n^k mod k [n,k >= 1].

Original entry on oeis.org

0, 1, 0, 1, 0, 0, 1, 2, 1, 0, 1, 0, 0, 0, 0, 1, 2, 1, 1, 1, 0, 1, 4, 3, 0, 2, 0, 0, 1, 2, 3, 4, 1, 0, 1, 0, 1, 0, 3, 4, 0, 0, 1, 0, 0, 1, 8, 1, 4, 1, 1, 1, 2, 1, 0, 1, 4, 0, 0, 5, 0, 2, 0, 0, 0, 0, 1, 2, 9, 1, 1, 6, 1, 3, 1, 1, 1, 0, 1, 4, 3, 6, 8, 0, 0, 4, 4, 0, 2, 0, 0, 1, 2, 9, 4, 5, 0, 1, 1, 3, 0, 1, 0, 1, 0
Offset: 1

Views

Author

Henry Bottomley, Mar 12 2001

Keywords

Examples

			T(5,3) = 5^3 mod 3 = 125 mod 3 = 2.
Rows start:
  0, 1, 1, 1, 1, ...
  0, 0, 2, 0, 2, ...
  0, 1, 0, 1, 3, ...
  0, 0, 1, 0, 4, ...
  0, 1, 2, 1, 0, ...
		

Crossrefs

Rows include A057427, A015910, A056969.
Columns include A000004, A000035 (several times), A010872, A010874, A010876, A021559 and other periodic sequences.
Diagonals include A000004 and A057427.
Cf. A114448.

Formula

T(n, k) = A051129(n, k)-n*A060155(n, k).

A060156 a(n) = floor(10^n/n).

Original entry on oeis.org

10, 50, 333, 2500, 20000, 166666, 1428571, 12500000, 111111111, 1000000000, 9090909090, 83333333333, 769230769230, 7142857142857, 66666666666666, 625000000000000
Offset: 1

Views

Author

Henry Bottomley, Mar 12 2001

Keywords

Examples

			a(6) = floor(1000000/6) = 166666.
		

Crossrefs

Programs

  • PARI
    { default(realprecision, 10); for (n=1, 200, write("b060156.txt", n, " ", floor(10^n/n)); ) } \\ Harry J. Smith, Jul 02 2009

Formula

a(n) = (A011557(n) - A056969(n))/n.
Showing 1-3 of 3 results.