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A032292 Number of series-reduced dyslexic planted compound windmills with n leaves. 1

%I #12 Jun 21 2018 10:33:16

%S 1,1,2,5,12,34,94,282,852,2664,8430,27192,88595,292038,970578,3251294,

%T 10961275,37171767,126693635,433789625,1491293824,5145686920,

%U 17814165387,61859118648,215399458550,751953130077

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

%H Andrew Howroyd, <a href="/A032292/b032292.txt">Table of n, a(n) for n = 1..200</a>

%H <a href="/index/Mo#mobiles">Index entries for sequences related to mobiles</a>

%F Doubles (index 2+) under "DIK" (bracelet, indistinct, unlabeled) transform.

%o (PARI)

%o 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}

%o 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

%K nonn

%O 1,3

%A _Christian G. Bower_

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)