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A192558
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a(n) = Sum_{k=0..n} stirling1(n,k)*stirling1(n+1,k+1)*k!.
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0
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1, 1, 5, 64, 1454, 50646, 2489402, 163460592, 13786580376, 1449996630360, 185811972643032, 28474991200053696, 5138710297861448112, 1078056139999155414384, 260049332237860544504400, 71447460830350118085570816, 22174520538085189702788173184
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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Table[Sum[StirlingS1[n, k]StirlingS1[n+1, k+1]k!, {k, 0, n}], {n, 0, 100}]
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PROG
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(Maxima) makelist(sum(stirling1(n, k)*stirling1(n+1, k+1)*k!, k, 0, n), n, 0, 24);
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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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