A032156 "CGK" (necklace, element, unlabeled) transform of 2,2,2,2,...

1, 2, 3, 6, 11, 18, 37, 66, 113, 222, 375, 674, 1195, 2170, 3589, 6126, 11173, 18202, 31543, 51098, 87675, 147222, 241721, 390426, 635365, 1065762, 1687559, 2774262, 4369023, 6947858, 11065897, 17908786, 27866053

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..1000

C. G. Bower, Transforms (2)

Index entries for sequences related to Lyndon words

Prog

(PARI) seq(n)=[subst(serlaplace(p/y), y, 1) | p <- Vec(y-1+prod(k=1, n, 1 + x^k*y + O(x*x^n))^2)] \\ Andrew Howroyd, Sep 13 2018

Crossrefs

Sequence in context: A093367 A054186 A347212 * A146385 A039827 A004135

Adjacent sequences: A032153 A032154 A032155 * A032157 A032158 A032159

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended by Andrew Howroyd, Sep 13 2018

Status

approved