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A279020
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a(n) = unreduced numerator in Sum_{k=1..n} (-1)^(k-1)/k^k.
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1
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0, 1, 3, 85, 21652, 67690148, 3158065145088, 2600806474859606784, 43634288683151793919033344, 16904817514490272003065681518985216, 169048175123324778807714958980684133171200000, 48231417258392463006590622244366007983063473271603200000
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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(0) = 0, a(n) = n^n * a(n-1) + (-1)^(n-1) * A002109(n-1).
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PROG
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(PARI) sum(k=1, n, (-1)^(k-1)/k^k) * prod(k=1, n, k^k)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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