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A032174 Number of series-reduced planted compound windmills with n leaves of 2 colors with no symmetries. 6

%I #12 Jun 21 2018 10:34:02

%S 2,1,4,15,66,291,1368,6555,32262,161505,821280,4227710,21996052,

%T 115469442,610894004,3253836785,17434360442,93907348819,508194420136,

%U 2761768079091,15065823780102,82469439357341

%N Number of series-reduced planted compound windmills with n leaves of 2 colors with no symmetries.

%H Andrew Howroyd, <a href="/A032174/b032174.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 "CHK" (necklace, identity, unlabeled) transform.

%o (PARI)

%o CHK(p,n)={sum(d=1, n, moebius(d)/d*log(subst(1/(1+O(x*x^(n\d))-p), x, x^d)))}

%o seq(n)={my(p=2*x); for(i=2, n, p+=x^i*polcoeff(CHK(p,i),i)); Vecrev(p/x)} \\ _Andrew Howroyd_, Jun 21 2018

%K nonn

%O 1,1

%A _Christian G. Bower_

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Last modified April 24 13:41 EDT 2024. Contains 371957 sequences. (Running on oeis4.)