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A372347
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a(n) = Sum_{j=0..n} p(n - j, j) where p(n, x) = Sum_{k=0..n} k! * Stirling1(n, k) * x^k.
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1
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1, 1, 2, 4, 12, 52, 334, 2866, 31902, 439510, 7372150, 147351714, 3460114654, 94073798158, 2926942982790, 103161703653178, 4084845678671086, 180433041383154870, 8836346732709839206, 477142911818397135058, 28265453383985064929934
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OFFSET
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0,3
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LINKS
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MAPLE
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p := n -> local k; add(k!*Stirling1(n, k)*x^k, k = 0..n):
a := n -> local j; add(subs(x=j, p(n - j)), j = 0..n):
seq(a(n), n = 0..21);
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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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