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 A318538 #8 Jul 02 2022 16:09:26
%S A318538 1,1,6,174,24360,15198120,38415132000,376482729702240,
%T A318538 14139748304132048640,2040859528996474439366400,
%U A318538 1141301651605590355550899891200,2494751188402618305982805631973248000,21474225685319103561274021904272069843353600
%N A318538 Number of n X n (0,1)-matrices with nonzero pairwise distinct rows and nonzero pairwise distinct columns.
%F A318538 a(n) = n! * Sum_{i=0..n} Stirling1(n+1,i+1) * binomial(2^i-1,n).
%F A318538 a(n) = A318537(n,n).
%F A318538 a(n) = A094000(n) * n!.
%o A318538 (PARI) { A318538(n) = n! * sum(i=0, n, stirling(n+1, i+1) * binomial(2^i - 1, n) ); }
%Y A318538 Main diagonal of A318537.
%Y A318538 Cf. A094000, A059202.
%K A318538 nonn
%O A318538 0,3
%A A318538 _Max Alekseyev_, Aug 28 2018