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A086721
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Denominator of Sum(binomial(n,k)/(n^2+k^2+1), k=0..n).
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1
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1, 6, 45, 7315, 153153, 41769, 79511041331, 21348855, 4066905218805, 131035613538221483, 78880516715, 639969453457759719, 19363383331179513605, 22789387342722276537165, 536273140516034211330020937, 7023910456240830342862673322145, 55469618987976034635639339
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| W. Koepf, Hypergeometric Summation, Vieweg, 1998, p. 53.
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EXAMPLE
| 1, 5/6, 29/45, 4679/7315, 115004/153153, 40990/41769, ...
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CROSSREFS
| Cf. A086720.
Sequence in context: A109516 A078865 A160492 * A145002 A043076 A154651
Adjacent sequences: A086718 A086719 A086720 * A086722 A086723 A086724
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KEYWORD
| nonn,frac
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jul 31 2003
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