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Search: id:A111140
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| A111140 |
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a(n) = (n!/(n+1))*Sum_{k=0..n} binomial(n+k-1,k)/k!. |
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+0
1
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| 1, 1, 3, 13, 71, 466, 3582, 31641, 316171, 3526606, 43421978, 584716386, 8544649478, 134622445348, 2274031087772, 40987164702945, 784981384215795, 15916200367695510, 340548893413909410, 7666975604019750630
(list; graph; listen)
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OFFSET
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0,3
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MATHEMATICA
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f[n_] := n!/(n + 1)*Sum[Binomial[n + k - 1, k]/k!, {k, 0, n}]; Table[f[n], {n, 0, 10}] (from Robert G. Wilson v (rgwv(at)rgwv.com), Oct 21 2005)
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CROSSREFS
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Adjacent sequences: A111137 A111138 A111139 this_sequence A111141 A111142 A111143
Sequence in context: A126390 A003319 A000261 this_sequence A137983 A059032 A047159
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KEYWORD
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easy,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 17 2005
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