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%I #5 May 17 2021 14:50:58
%S 1,6,45,7315,153153,41769,79511041331,21348855,4066905218805,
%T 131035613538221483,78880516715,639969453457759719,
%U 19363383331179513605,22789387342722276537165,536273140516034211330020937,7023910456240830342862673322145,55469618987976034635639339
%N Denominator of Sum_{k=0..n} binomial(n,k)/(n^2+k^2+1).
%D W. Koepf, Hypergeometric Summation, Vieweg, 1998, p. 53.
%e 1, 5/6, 29/45, 4679/7315, 115004/153153, 40990/41769, ...
%Y Cf. A086720.
%K nonn,frac
%O 0,2
%A _N. J. A. Sloane_, Jul 31 2003
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