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 A088616 #10 May 05 2025 17:22:12 %S A088616 0,0,24,6840,6568800,22080988800,262378244741760 %N A088616 a(n) = number of n X n (0,1) matrices A such that the 2n vectors consisting of the rows and the columns of the matrix A are all distinct. %C A088616 What if you also ask that the two main diagonals are also distinct? - _N. J. A. Sloane_, Jan 03 2004 %Y A088616 Cf. A088310. %Y A088616 Binary matrices with distinct rows and columns, various versions: A059202, A088309, A088310, A088616, A089673, A089674, A093466, A094000, A094223, A116532, A116539, A181230, A259763 %K A088616 nonn,more %O A088616 1,3 %A A088616 Yuval Dekel and _Vladeta Jovovic_, Nov 17 2003 %E A088616 a(6)-a(7) from _Bert Dobbelaere_, May 05 2025