

A032203


Number of seriesreduced 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



