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 A134369 #6 Oct 26 2017 15:53:46
%S A134369 1,36,1728000,645241282560000,6292383221978976013516800000,
%T A134369 4045146997974190235742848547815424000000000000,
%U A134369 363046466970952735968096996065196818096105852014637875200000000000000
%N A134369 a(n) = ((2n+1)!)^(n+1).
%F A134369 a(n) ~ 2^(2*(n+1)^2) * exp(13/24 - 2*n*(n+1)) * n^((n+1)*(4*n+3)/2) * Pi^((n+1)/2). - _Vaclav Kotesovec_, Oct 26 2017
%t A134369 Table[((2n+1)!)^(n + 1), {n, 0, 10}]
%Y A134369 Cf. A000142, A001044, A000442, A036740, A134366, A134367, A134368, A134370, A134371, A134374, A134375.
%K A134369 nonn
%O A134369 0,2
%A A134369 _Artur Jasinski_, Oct 22 2007