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 A368065 #6 Dec 10 2023 09:25:07
%S A368065 1,7,44100,3210672937500,12804360424787610000000000,
%T A368065 8591751256288909159255104643281750000000000,
%U A368065 2333034616280404811605303958158227652934766912996000000000000000000
%N A368065 a(n) = Product_{i=1..n, j=1..n} (i^2 + 5*i*j + j^2).
%F A368065 a(n) ~ c * 7^(7*n*(n+1)/2) * ((5-sqrt(21))/2)^(sqrt(21)*n*(n+1)/2) * n^(2*n^2 - 4/3) / exp(3*n^2), where c = A368069.
%t A368065 Table[Product[i^2 + 5*i*j + j^2, {i, 1, n}, {j, 1, n}], {n, 0, 7}]
%Y A368065 Cf. A367543, A324403, A367542, A079478^2, A368067, A368064, A368066.
%Y A368065 Cf. A368068, A368069.
%K A368065 nonn
%O A368065 0,2
%A A368065 _Vaclav Kotesovec_, Dec 10 2023