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 A131373 #2 Mar 30 2012 17:25:22 %S A131373 1,1,1,1,1,1,1,2,2,1,1,2,5,2,1,1,3,6,6,3,1,1,3,10,7,10,3,1,1,4,11,14, %T A131373 14,11,4,1,1,4,16,15,29,15,16,4,1,1,5,17,26,35,35,26,17,5,1 %N A131373 A046854 + A065941 - A000012. %C A131373 Row sums = A131269: (1, 2, 3, 6, 11, 20, 35, 60,...). %F A131373 A046854 + A065941 - A000012 as infinite lower triangular matrices. %e A131373 First few rows of the triangle are: %e A131373 1; %e A131373 1, 1; %e A131373 1, 1, 1; %e A131373 1, 2, 2, 1; %e A131373 1, 2, 5, 2, 1; %e A131373 1, 3, 6, 6, 3, 1; %e A131373 1, 3, 10, 7, 10, 3, 1; %e A131373 1, 4, 11, 14, 14, 11, 4, 1; %e A131373 1, 4, 16, 15, 29, 15, 16, 4, 1; %e A131373 ... %Y A131373 Cf. A056854, A065941, A000012, A131269. %K A131373 nonn,tabl %O A131373 0,8 %A A131373 _Gary W. Adamson_, Jul 03 2007