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A032173 Shifts left 2 places under "CHK" (necklace, identity, unlabeled) transform. 1
1, 1, 1, 1, 2, 3, 7, 12, 28, 55, 122, 258, 574, 1254, 2813, 6283, 14220, 32237, 73631, 168660, 388331, 896790, 2078822, 4832343, 11266422, 26332119, 61694574, 144858260, 340829231, 803427128, 1897269215, 4487725726 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..200

PROG

(PARI)

CHK(p, n)={sum(d=1, n, moebius(d)/d*log(subst(1/(1+O(x*x^(n\d))-p), x, x^d)))}

seq(n)={my(p=1+O(x)); for(i=1, n\2, p=1+x+x*CHK(x*p, 2*i)); Vec(p+O(x^n))} \\ Andrew Howroyd, Jun 20 2018

CROSSREFS

Sequence in context: A296517 A182692 A203837 * A130616 A089324 A297438

Adjacent sequences:  A032170 A032171 A032172 * A032174 A032175 A032176

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified October 20 11:38 EDT 2018. Contains 316379 sequences. (Running on oeis4.)