This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A130552 #7 Nov 09 2019 16:27:41
%S A130552 1,24,1080,60480,1512000,7128000,31783752000,254270016000,
%T A130552 38903312448000,67196630592000,89438715317952000,9308101594176000,
%U A130552 347648286440879424000,347648286440879424000,50409001533927516480000,735378375318472005120000,3612913957939652961154560000,18401938665227434437120000
%N A130552 Denominators of partial sums for a series of (4/5)*Zeta(3).
%C A130552 For the rationals r(n) := 2*Sum_{j=1..n} ((-1)^(j-1))/((j^3)*binomial(2*j,j)), n >= 1, the van der Poorten reference and a W. Lang link see A130551.
%C A130552 Numerators are given in A130551.
%F A130552 a(n) = denominator(r(n)), n >= 1.
%o A130552 (PARI) a(n) = denominator(2*sum(j=1, n, (-1)^(j-1)/(j^3*binomial(2*j,j)))); \\ _Michel Marcus_, Nov 09 2019
%Y A130552 Cf. A130551 (numerators).
%K A130552 nonn,frac,easy
%O A130552 1,2
%A A130552 _Wolfdieter Lang_, Jul 13 2007
%E A130552 More terms from _Michel Marcus_, Nov 09 2019