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A032292
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Number of series-reduced dyslexic planted compound windmills with n leaves.
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1
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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
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OFFSET
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1,3
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LINKS
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FORMULA
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Doubles (index 2+) under "DIK" (bracelet, indistinct, unlabeled) transform.
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PROG
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(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
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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