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A032289
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Number of dyslexic rooted compound windmills with n nodes.
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2
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1, 1, 2, 4, 9, 20, 49, 119, 305, 790, 2100, 5648, 15449, 42664, 119128, 335310, 951119, 2714974, 7795211, 22493655, 65202995, 189767806, 554326057, 1624572250, 4775504516, 14076385819, 41596613660, 123206155126
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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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Shifts left 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=O(1)); for(i=1, n, p=1+DIK(x*p, i)); Vec(p)} \\ Andrew Howroyd, Jun 20 2018
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CROSSREFS
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KEYWORD
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nonn,eigen
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AUTHOR
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STATUS
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approved
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