A032157 - OEIS

A032157

"CGK" (necklace, element, unlabeled) transform of 2,1,1,1,...

1, 2, 2, 3, 5, 6, 10, 17, 21, 30, 46, 79, 97, 142, 190, 285, 465, 590, 826, 1131, 1541, 2142, 3458, 4281, 6037, 8030, 10974, 14295, 19993, 29806, 37822, 51517, 68449, 91326, 119610, 158315, 208525, 306606, 381674, 515193, 669605

(list; graph; refs; listen; history; text; internal format)

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+(1 + x*y)*prod(k=1, n, 1 + x^k*y + O(x*x^n)))] \\ Andrew Howroyd, Sep 13 2018

CROSSREFS

Sequence in context: A227360 A111077 A283189 * A153926 A035425 A139074

Adjacent sequences: A032154 A032155 A032156 * A032158 A032159 A032160

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

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

STATUS

approved