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 A306907 #19 Mar 26 2019 03:11:27
%S A306907 1,2,60750,193002701276968128000000,
%T A306907 5076574217867350877310882935055477754989937924247841796875000000000000
%N A306907 a(n) = Product_{i=0..n, j=0..n, k=0..n} (i*j*k + 1).
%C A306907 Next term is too long to be included.
%F A306907 a(n) = (n!)^(3*n^2) * Product_{i=1..n, j=1..n, k=1..n} (1 + 1/(i*j*k)).
%F A306907 a(n) ~ exp(3*n^2*log(Gamma(n+1)) + (gamma + PolyGamma(0, n+1))^3 - c), where gamma is the Euler-Mascheroni constant A001620 and c = A307106 = Sum_{k>=2} (-1)^k * Zeta(k)^3 / k = 1.836921908595663783265640880112170343162564662453544904457...
%F A306907 a(n) ~ (2*Pi)^(3*n^2/2) * exp(-3*n^3 + n/4 + (log(n))^3 + 3*gamma*(log(n))^2 + gamma^3 - c) * n^(3*(n^3 + n^2/2 + gamma^2)).
%t A306907 Table[Product[i*j*k+1,{i,0,n},{j,0,n},{k,0,n}],{n,0,5}]
%Y A306907 Cf. A306760, A307106.
%K A306907 nonn
%O A306907 0,2
%A A306907 _Vaclav Kotesovec_, Mar 25 2019