

A032290


Number of dyslexic rooted compound windmills with n nodes and leaves of 2 colors.


1



2, 2, 5, 13, 38, 115, 377, 1267, 4446, 15970, 58741, 219765, 834779, 3208732, 12461304, 48809233, 192596729, 764814458, 3054101548, 12255774481, 49396159564, 199867069373, 811554088996, 3305812070784
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OFFSET

1,1


LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..200
Index entries for sequences related to mobiles


FORMULA

Shifts left under "DIK" (bracelet, indistinct, unlabeled) transform.


PROG

(PARI)
DIK(p, n)={(sum(d=1, n, eulerphi(d)/d*log(subst(1/(1+O(x*x^(n\d))p), x, x^d))) + ((1+p)^2/(1subst(p, x, x^2))1)/2)/2}
seq(n)={my(p=O(1)); for(i=1, n, p=2+DIK(x*p, i)); Vec(p)} \\ Andrew Howroyd, Jun 20 2018


CROSSREFS

Sequence in context: A019083 A029856 A072898 * A032201 A268180 A268003
Adjacent sequences: A032287 A032288 A032289 * A032291 A032292 A032293


KEYWORD

nonn


AUTHOR

Christian G. Bower


STATUS

approved



