A006711 -id:A006711 - cp's OEIS frontend

A022477 Number of 1's in n-th term of A006711.

1, 2, 1, 3, 2, 6, 6, 6, 5, 12, 11, 16, 18, 30, 32, 48, 61, 85, 103, 148, 192, 247, 307, 427, 578, 754, 965, 1324, 1783, 2349, 3061, 4068, 5467, 7253, 9508, 12620, 16874, 22397, 29520, 39169, 52176, 69270, 91629, 121575, 161770, 214554, 284132, 377270

Offset: 1

Clark Kimberling

nonn

Cf. A006711, A022478, A022479.

More terms from Sean A. Irvine, May 15 2019

A022478 Number of 2's in n-th term of A006711.

Original entry on oeis.org

0, 0, 1, 1, 1, 1, 2, 4, 8, 6, 10, 9, 14, 16, 21, 28, 38, 45, 69, 86, 123, 157, 210, 280, 363, 480, 622, 818, 1104, 1453, 1940, 2567, 3421, 4534, 5996, 7992, 10590, 14005, 18596, 24707, 32784, 43361, 57566, 76449, 101457, 134506, 178495, 237051

Offset: 1

Clark Kimberling

Cf. A006711, A022477, A022479.

More terms from Sean A. Irvine, May 15 2019

A022479 Number of 3's in n-th term of A006711.

Original entry on oeis.org

0, 0, 0, 0, 1, 1, 2, 2, 1, 2, 3, 5, 6, 8, 13, 16, 21, 30, 38, 50, 63, 86, 115, 145, 193, 258, 355, 466, 609, 820, 1093, 1449, 1898, 2523, 3380, 4450, 5878, 7834, 10430, 13798, 18246, 24299, 32307, 42806, 56685, 75342, 100107, 132631

Offset: 1

Clark Kimberling

Cf. A006711, A022477, A022478.

More terms from Sean A. Irvine, May 15 2019

A022476 Length of n-th term of A006711.

Original entry on oeis.org

1, 2, 2, 4, 4, 8, 10, 12, 14, 20, 24, 30, 38, 54, 66, 92, 120, 160, 210, 284, 378, 490, 632, 852, 1134, 1492, 1942, 2608, 3496, 4622, 6094, 8084, 10786, 14310, 18884, 25062, 33342, 44236, 58546, 77674, 103206, 136930, 181502, 240830, 319912, 424402, 562734, 746952, 991572, 1315400

Offset: 1

Clark Kimberling

Cf. A006711.

More terms from Sean A. Irvine, May 15 2019

A022480 Sum of digits in n-th term of A006711.

Original entry on oeis.org

1, 2, 3, 5, 7, 11, 16, 20, 24, 30, 40, 49, 64, 86, 113, 152, 200, 265, 355, 470, 627, 819, 1072, 1422, 1883, 2488, 3274, 4358, 5818, 7715, 10220, 13549, 18003, 23890, 31640, 41954, 55688, 73909, 98002, 129977, 172482, 228889, 303682, 402891, 534739, 709592, 941443, 1249265

Offset: 1

Clark Kimberling

More terms from Sean A. Irvine, May 16 2019

A022482 Describe previous term from the right (method A - initial term is 2).

Original entry on oeis.org

2, 12, 1211, 211211, 21122112, 1221222112, 122132112211, 2122211213112211, 21222113111221321112, 123112131122311321321112, 123112131112132113222113111221131211

Offset: 1

Clark Kimberling

Method A = 'frequency' followed by 'digit'-indication.

			E.g. the term after 1211 is obtained by saying "two 1's, one 2, one 1", which gives 211211.

Reinhard Zumkeller, Table of n, a(n) for n = 1..22
Eric Weisstein's World of Mathematics, Look and Say Sequence
Wikipedia, Look-and-say sequence

Cf. A022506, A006711, A022507-A022513.

a022482 n = a022482_list !! (n-1)
a022482_list = iterate (a045918 . a004086) 2
-- Reinhard Zumkeller, Mar 02 2014

A022482[1]:=2;A022482[n_]:=A022482[n]=FromDigits[Flatten[{Length[#],First[#]}&/@Split[Reverse[IntegerDigits[A022482[n-1]]]]]];Map[A022482,Range[15]] (* Peter J. C. Moses, Apr 22 2013 *)

a(n+1) = A045918(A004086(a(n))). - Reinhard Zumkeller, Mar 02 2014

A022506 Describe previous term from the right (method A - initial term is 0).

Original entry on oeis.org

0, 10, 1011, 211011, 21102112, 122112102112, 122112101112212211, 2122112231101112212211, 21221122311021132221221112, 12312211321321121021132221221112

Offset: 0

N. J. A. Sloane

Method A = 'frequency' followed by 'digit'-indication.

			The term after 1011 is obtained by saying "two 1's, one 0, one 1", which gives 211011.

Reinhard Zumkeller, Table of n, a(n) for n = 0..21
Eric Weisstein's World of Mathematics, Look and Say Sequence
Wikipedia, Look-and-say sequence

Cf. A006711, A022482, A022507-A022513.

a022506 n = a022506_list !! n
a022506_list = 0 : 10 : iterate (a045918 . a004086) 1011
-- Reinhard Zumkeller, Mar 02 2014

a[0] = 0;
a[n_] := a[n] = Split[IntegerDigits[a[n-1]]] /. L_List /; IntegerQ[L[[1]]] :> {Length[L], L[[1]]} // Reverse // Flatten // FromDigits;
a /@ Range[0, 9] (* Jean-François Alcover, Nov 26 2019 *)

For n > 1: a(n+1) = A045918(A004086(a(n))). - Reinhard Zumkeller, Mar 02 2014

More terms from Erich Friedman

A022513 Describe previous term from the right (method A - initial term is 9).

Original entry on oeis.org

9, 19, 1911, 211911, 21192112, 122112192112, 122112191112212211, 2122112231191112212211, 21221122311921132221221112, 12312211321321121921132221221112

Offset: 0

N. J. A. Sloane

Method A = 'frequency' followed by 'digit'-indication.

			E.g., the term after 1911 is obtained by saying "two 1's, one 9, one 1", which gives 211911.

Cf. A005150, A022506, A006711, A022482, A022507-A022512.

More terms from Erich Friedman

A022507 Describe previous term from the right (method A - initial term is 3).

Original entry on oeis.org

3, 13, 1311, 211311, 21132112, 122112132112, 122112131112212211, 2122112231131112212211, 21221122311321132221221112, 12312211321321121321132221221112

Offset: 0

N. J. A. Sloane

Method A = 'frequency' followed by 'digit'-indication.

			The term after 1311 is obtained by saying "two 1's, one 3, one 1", which gives 211311.

Reinhard Zumkeller, Table of n, a(n) for n = 0..21
Eric Weisstein's World of Mathematics, Look and Say Sequence
Wikipedia, Look-and-say sequence

Cf. A022506, A006711, A022482, A022508-A022513.

a022507 n = a022507_list !! n
a022507_list = iterate (a045918 . a004086) 3
-- Reinhard Zumkeller, Mar 02 2014

A022507[1]:=3;A022507[n_]:=A022507[n]=FromDigits[Flatten[{Length[#],First[#]}&/@Split[Reverse[IntegerDigits[A022507[n-1]]]]]];Map[A022507,Range[15]] (* Peter J. C. Moses, Apr 22 2013 *)

a(n+1) = A045918(A004086(a(n))). - Reinhard Zumkeller, Mar 02 2014

More terms from Erich Friedman

A138484 Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 0.

Original entry on oeis.org

0, 10, 1011, 3110, 102113, 13311210, 10411223, 1322311410, 1041142322, 3213243110, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422

Offset: 0

Paolo P. Lava and Giorgio Balzarotti, Mar 20 2008

After a while sequence has period 2 -> {1031331422,2214313310}

			To get the term after 102113, we say: one 3's, three 1's, one 2's, one 0's, so 13311210.

Cf. A063850, A022482, A005150, A005151, A006751, A006715, A006711, A022506-A022513, A138485-A138493.

cp's OEIS Frontend

A022477 Number of 1's in n-th term of A006711.

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A022478 Number of 2's in n-th term of A006711.

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A022479 Number of 3's in n-th term of A006711.

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A022476 Length of n-th term of A006711.

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A022480 Sum of digits in n-th term of A006711.

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A022482 Describe previous term from the right (method A - initial term is 2).

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A022506 Describe previous term from the right (method A - initial term is 0).

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A022513 Describe previous term from the right (method A - initial term is 9).

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A022507 Describe previous term from the right (method A - initial term is 3).

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A138484 Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 0.

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