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A086721
Denominator of Sum_{k=0..n} binomial(n,k)/(n^2+k^2+1).
1
1, 6, 45, 7315, 153153, 41769, 79511041331, 21348855, 4066905218805, 131035613538221483, 78880516715, 639969453457759719, 19363383331179513605, 22789387342722276537165, 536273140516034211330020937, 7023910456240830342862673322145, 55469618987976034635639339
OFFSET
0,2
REFERENCES
W. Koepf, Hypergeometric Summation, Vieweg, 1998, p. 53.
EXAMPLE
1, 5/6, 29/45, 4679/7315, 115004/153153, 40990/41769, ...
CROSSREFS
Cf. A086720.
Sequence in context: A356487 A322089 A273091 * A145002 A043076 A154651
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Jul 31 2003
STATUS
approved