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A032217
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"DFK" (bracelet, size, unlabeled) transform of 1,3,5,7...
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1
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1, 1, 3, 8, 12, 31, 56, 107, 168, 372, 830, 1302, 2527, 4370, 9478, 25268, 38655, 72876, 133073, 238255, 477957, 1357657, 1967349, 3747310, 6374674, 11569115, 19219719, 38342864, 104469668, 150682797, 276855048
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OFFSET
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0,3
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LINKS
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PROG
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(PARI) seq(n)={apply(p->subst(serlaplace(p/y + polcoeff(p, 1) + polcoeff(p, 2)), y, 1)/2, Vec(y-1+prod(k=1, n, 1 + (2*k-1)*x^k*y + O(x*x^n))))} \\ 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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EXTENSIONS
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STATUS
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approved
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