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 A032160 Number of rooted compound windmills with n nodes where any 2 submills extending from the same node are different. 1
 1, 1, 1, 2, 3, 6, 13, 28, 61, 138, 325, 758, 1804, 4317, 10457, 25484, 62478, 154000, 381494, 949217, 2370840, 5943552, 14946766, 37700390, 95346724, 241744854, 614328965, 1564488480, 3992092421, 10205366192 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Andrew Howroyd, Table of n, a(n) for n = 1..200 C. G. Bower, Transforms (2) FORMULA Shifts left 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=[1]); for(i=2, n, v=concat([1], CGK(v))); v} \\ Andrew Howroyd, Sep 20 2018 CROSSREFS Sequence in context: A075853 A132045 A032143 * A089735 A316694 A000646 Adjacent sequences:  A032157 A032158 A032159 * A032161 A032162 A032163 KEYWORD nonn AUTHOR STATUS approved

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Last modified January 19 05:41 EST 2019. Contains 319304 sequences. (Running on oeis4.)