A032292 - OEIS

A032292

Number of series-reduced dyslexic planted compound windmills with n leaves.

1, 1, 2, 5, 12, 34, 94, 282, 852, 2664, 8430, 27192, 88595, 292038, 970578, 3251294, 10961275, 37171767, 126693635, 433789625, 1491293824, 5145686920, 17814165387, 61859118648, 215399458550, 751953130077

(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

FORMULA

Doubles (index 2+) 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/(1-subst(p, x, x^2))-1)/2)/2}

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

CROSSREFS

Sequence in context: A076864 A209798 A196545 * A151408 A121956 A348102

Adjacent sequences: A032289 A032290 A032291 * A032293 A032294 A032295

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved