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A032157
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"CGK" (necklace, element, unlabeled) transform of 2,1,1,1,...
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1
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1, 2, 2, 3, 5, 6, 10, 17, 21, 30, 46, 79, 97, 142, 190, 285, 465, 590, 826, 1131, 1541, 2142, 3458, 4281, 6037, 8030, 10974, 14295, 19993, 29806, 37822, 51517, 68449, 91326, 119610, 158315, 208525, 306606, 381674, 515193, 669605
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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PROG
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(PARI) seq(n)=[subst(serlaplace(p/y), y, 1) | p <- Vec(y-1+(1 + x*y)*prod(k=1, n, 1 + x^k*y + O(x*x^n)))] \\ Andrew Howroyd, Sep 13 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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