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 A134371 #5 Oct 26 2017 15:56:43
%S A134371 1,2,576,373248000,2642908293365760000,
%T A134371 629238322197897601351680000000000,
%U A134371 12078744213598964456884373878200091017216000000000000
%N A134371 a(n) = ((2n)!)^n.
%F A134371 a(n) ~ 2^(n*(2*n+1)) * exp(1/24 - 2*n^2) * n^(n*(4*n+1)/2) * Pi^(n/2). - _Vaclav Kotesovec_, Oct 26 2017
%t A134371 Table[((2n)!)^(n), {n, 0, 10}]
%Y A134371 Cf. A000142, A001044, A000442, A036740, A134366, A134367, A134368, A134369, A134370, A134374, A134375.
%K A134371 nonn
%O A134371 0,2
%A A134371 _Artur Jasinski_, Oct 22 2007