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A032139 "CFK" (necklace, size, unlabeled) transform of 2,2,2,2... 1
1, 2, 2, 6, 6, 10, 26, 30, 46, 66, 178, 198, 326, 442, 666, 1566, 1886, 2882, 4082, 5942, 8006, 18426, 21450, 33502, 45854, 67314, 89074, 128310, 252406, 309498, 459914, 635470, 904350, 1214514, 1702562, 2240246, 4261430 (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)={apply(p->subst(serlaplace(p/y), y, 1), Vec(y-1+prod(k=1, n, 1 + 2*x^k*y + O(x*x^n))))} \\ Andrew Howroyd, Jun 21 2018

CROSSREFS

Sequence in context: A032214 A290261 A007040 * A032043 A200561 A241380

Adjacent sequences:  A032136 A032137 A032138 * A032140 A032141 A032142

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

a(0)=1 prepended by Andrew Howroyd, Jun 21 2018

STATUS

approved

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Last modified October 16 20:34 EDT 2018. Contains 316275 sequences. (Running on oeis4.)