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A032203 Number of series-reduced planted compound windmills with n leaves. 2
1, 1, 2, 5, 12, 36, 104, 331, 1062, 3519, 11809, 40327, 139066, 484698, 1702819, 6026452, 21460248, 76846950, 276524978, 999423375, 3626370269, 13205135288, 48241233346, 176757275833, 649399348322, 2391817886703 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

Index entries for sequences related to mobiles

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 79

FORMULA

Doubles (index 2+) under "CIK" (necklace, indistinct, unlabeled) transform.

PROG

(PARI)

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

seq(n)={my(p=x); for(i=2, n, p+=x^i*polcoeff(CIK(p, i), i)); Vecrev(p/x)} \\ Andrew Howroyd, Jun 21 2018

CROSSREFS

Sequence in context: A283799 A225798 A303204 * A197444 A094717 A038142

Adjacent sequences:  A032200 A032201 A032202 * A032204 A032205 A032206

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified October 21 16:33 EDT 2018. Contains 316427 sequences. (Running on oeis4.)