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 A032163 Number of series-reduced planted compound windmills with n leaves of 2 colors where any 2 submills extending from the same node are different. 1
 2, 1, 2, 6, 18, 63, 232, 868, 3338, 13105, 52270, 210822, 859528, 3535424, 14654628, 61150659, 256674992, 1083008336, 4590945532, 19542842196, 83504907276, 358032884540, 1539885406796, 6641914100221 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Andrew Howroyd, Table of n, a(n) for n = 1..200 C. G. Bower, Transforms (2) FORMULA Doubles (index 2+) under "CGK" (necklace, element, unlabeled) transform. PROG (PARI) CGK(v)={apply(p->subst(serlaplace(p/y), y, 1), Vec(prod(k=1, #v, (1 + x^k*y + O(x*x^#v))^v[k])-1, -#v))} seq(n)={my(v=[2]); for(i=2, n, v=concat(v, CGK(concat(v, [0]))[i])); v} \\ Andrew Howroyd, Sep 20 2018 CROSSREFS Sequence in context: A246466 A170829 A032085 * A038078 A000139 A302190 Adjacent sequences:  A032160 A032161 A032162 * A032164 A032165 A032166 KEYWORD nonn AUTHOR STATUS approved

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Last modified August 5 07:54 EDT 2021. Contains 346464 sequences. (Running on oeis4.)