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A087314
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a(n) = (1/n) * Sum_{k = 0..n} n^binomial(n,k).
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1
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2, 4, 20, 1154, 3907502, 609516468354242, 108233912076063807870514781000, 205688069665244291374160325606433848956971528595913979304345602, 381367496233593231179533022742555015402552706280473714446093438118953849830784189071820024395733993533363857256493600698
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(3) = 1/3*{ 3^1 +3^3+3^3+3^1} = 20.
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PROG
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(PARI) a(n) = sum(k = 0, n, n^binomial(n, k))/n; \\ David Wasserman, May 02 2005
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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