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 A272165 #4 Apr 21 2016 16:48:33
%S A272165 0,4,6912,1632586752,92771293593600000,1922167968750000000000000000,
%T A272165 20386493620375898676722605059420979200000,
%U A272165 147691962494584259939724821292542617401603191419699200000
%N A272165 a(n) = Product_{k=0..n} (k*n-k)^k.
%F A272165 a(n) ~ A * n^(n^2 + n + 1/12) / exp((n^2 + 2*n + 3)/4), where A = A074962 is the Glaisher-Kinkelin constant.
%t A272165 Table[Product[(k*n-k)^k, {k, 1, n}], {n, 1, 10}]
%Y A272165 Cf. A272166.
%K A272165 nonn,easy
%O A272165 1,2
%A A272165 _Vaclav Kotesovec_, Apr 21 2016