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A032147
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"CGJ" (necklace, element, labeled) transform of 2,2,2,2...
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1
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1, 2, 4, 14, 72, 262, 2266, 13582, 78952, 1073318, 6111354, 51512782, 711544290, 7083724494, 53971180750, 497724073414, 12107546905192, 92786772785254, 1022794345965706, 9782774173172782, 237827594204392882, 3191236514753612878, 31668668622796517470
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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+serlaplace(prod(k=1, n, 1 + x^k*y/k! + O(x*x^n))^2))] \\ Andrew Howroyd, Sep 11 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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a(0)=1 prepended and terms a(20) and beyond from Andrew Howroyd, Sep 11 2018
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STATUS
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approved
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