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 A125699 #14 Feb 16 2025 08:33:04 %S A125699 1,2,7,1,35,6,228,28,2,2237,159,11,31559,1075,77,3,1668997,9389,497,24 %N A125699 Table, T(n,k) is the number of connected categories with n morphisms and k objects. %C A125699 Connected in the sense that if the morphism direction and composition is ignored, resulting in a multigraph, that multigraph is connected. %H A125699 Ben Spitz, <a href="https://github.com/diracdeltafunk/SmallCategories#statistics">SmallCategories</a> %H A125699 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Category.html">Category</a> %e A125699 The table starts: %e A125699 1; %e A125699 2; %e A125699 7, 1; %e A125699 35, 6; %e A125699 228, 28, 2; %e A125699 2237, 159, 11; %e A125699 31559, 1075, 77, 3; %e A125699 1668997, 9389, 497, 24; %e A125699 ... %Y A125699 Cf. A125696, A125698 (row sums), A110654 (row lengths), A058129 (column 1), A125700 (diagonal sums), A125702 (T(2n-1, n)). %K A125699 tabf,hard,more,nonn %O A125699 1,2 %A A125699 _Franklin T. Adams-Watters_ and _Christian G. Bower_, Jan 05 2007 %E A125699 a(14)-a(20) from _Ben Spitz_, Sep 02 2023