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A032293
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Number of series-reduced dyslexic planted compound windmills with n leaves of 2 colors.
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1
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2, 3, 10, 41, 180, 873, 4406, 23226, 125722, 696139, 3920842, 22398781, 129445934, 755446276, 4445631466, 26350577022, 157171541470, 942671178054, 5681706775452, 34395634415206, 209045930188038
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OFFSET
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1,1
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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=2*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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