A071942 Kolakoski-(3,4) sequence: a(n) is length of n-th run.

3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3

Offset

1,1

Links

Ivan Neretin, Table of n, a(n) for n = 1..10000

Michael Baake and Bernd Sing, Kolakoski-(3,1) is a (deformed) model set, arXiv:math/0206098 [math.MG], 2002-2003.

Mathematica

seed = {3, 4}; w = {}; i = 1; Do[w = Join[w, Array[seed[[Mod[i - 1, Length[seed]] + 1]] &, If[i > Length[w], seed, w][[i]]]]; i++, {n, 31}]; w (* Ivan Neretin, Apr 02 2015 *)

Crossrefs

Cf. A000002, A071820, A071907, A071928, A064353.

Sequence in context: A230194 A128112 A122669 * A289189 A134849 A096056

Adjacent sequences: A071939 A071940 A071941 * A071943 A071944 A071945

Keyword

nonn,easy

Author

N. J. A. Sloane

Extensions

More terms from Benoit Cloitre, Feb 17 2003

Status

approved