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Search: id:A074649
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| A074649 |
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a(0) = 1; for n >= 1, a(n) = sum(binomial(n,k)^3*binomial(n+k,k+1)^2,k = 0..n)/n^2. |
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4
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| 1, 2, 23, 434, 10897, 327270, 11076235, 408850370, 16119036965, 669177449258, 28960814900899, 1297024187184478, 59777126587203937, 2822927389747980806, 136132927766691327651, 6685542830954666301218, 333618582889745741654221
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OFFSET
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0,2
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FORMULA
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Special values of the hypergeometric function 5F4, in Maple notation : a(n)= hypergeom([n+1, n+1, -n, -n, -n], [1, 1, 2, 2], -1), n=0, 1...
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MATHEMATICA
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a[0] = 1; a[n_] := Sum[Binomial[n, k]^3*Binomial[n + k, k + 1]^2, {k, 0, n}]/n^2; Table[a[n], {n, 0, 16}]
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CROSSREFS
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Cf. A074635.
Sequence in context: A091693 A060941 A119774 this_sequence A134355 A054260 A053160
Adjacent sequences: A074646 A074647 A074648 this_sequence A074650 A074651 A074652
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KEYWORD
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nonn
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AUTHOR
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Karol A. Penson (penson(AT)lptl.jussieu.fr), Aug 28 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 29 2002
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