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 A071308 #10 Nov 07 2022 02:22:40 %S A071308 1,8,720,691200,6739200000,668528640000000,663347543040000000000, %T A071308 6622861869711360000000000000,660754650163765248000000000000000000, %U A071308 660543208675712843120640000000000000000000000,6601093143555139842468151296000000000000000000000000000 %N A071308 a(n) = (1/2) * (number of n X n 0..9 matrices with MM' mod 10 = I). %F A071308 a(n) = A003053(n) * A071304(n). - _Max Alekseyev_, Nov 06 2022 %Y A071308 Cf. A003053, A071302, A071303, A071304, A071305, A071306, A071307, A071309, A071310. %K A071308 nonn %O A071308 1,2 %A A071308 _R. H. Hardin_, Jun 11 2002 %E A071308 Terms a(6) onward from _Max Alekseyev_, Nov 06 2022