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A192550
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a(n) = sum(stirling2(n+1,k+1)*k!^2,k=0..n).
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1
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1, 2, 8, 68, 1052, 25772, 915308, 44417228, 2822059052, 227292363212, 22626053864108, 2727566236006988, 391549961731396652, 65997870405560143052, 12906384138105870075308, 2898250311530883985046348, 740679847516042935202775852
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OFFSET
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0,2
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LINKS
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FORMULA
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MATHEMATICA
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Table[Sum[StirlingS2[n+1, k+1]k!^2, {k, 0, n}], {n, 0, 100}]
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PROG
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(Maxima) makelist(sum(stirling2(n+1, k+1)*k!^2, k, 0, n), n, 0, 12);
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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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