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 A367956 #8 Dec 07 2023 02:20:13
%S A367956 1,4,1120,79833600,3173289799680000,123650071173117090201600000,
%T A367956 7337799401269093351612002462597120000000,
%U A367956 951792703318385182295191545713146608287219712000000000000
%N A367956 a(n) = Product_{i=1..n, j=1..n} (i + 3*j).
%F A367956 a(n) ~ A^(1/3) * 2^(16*n*(n+1)/3 + 13/18) * n^(n^2 - 19/36) / (Pi^(1/3) * Gamma(1/3)^(1/3) * 3^(n*(3*n+4)/2 + 11/36) * exp(3*n^2/2 + 1/36)), where A = A074962 is the Glaisher-Kinkelin constant.
%t A367956 Table[Product[i + 3*j, {i, 1, n}, {j, 1, n}], {n, 0, 10}]
%Y A367956 Cf. A074962, A079478, A324402, A367957, A367958.
%K A367956 nonn
%O A367956 0,2
%A A367956 _Vaclav Kotesovec_, Dec 06 2023