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A371146
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E.g.f. satisfies A(x) = 1/(1 - x*A(x)^2)^(x*A(x)^2).
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0
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1, 0, 2, 3, 116, 690, 24714, 315840, 11919088, 250812072, 10389272040, 310700914920, 14351129171400, 557402214180240, 28831564284582864, 1372162923004025880, 79345973798740154880, 4450055092134985771200, 286324089075857021558976
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = n! * Sum_{k=0..floor(n/2)} (2*n+1)^(k-1) * |Stirling1(n-k,k)|/(n-k)!.
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PROG
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(PARI) a(n) = n!*sum(k=0, n\2, (2*n+1)^(k-1)*abs(stirling(n-k, k, 1))/(n-k)!);
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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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