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 A128186 #7 Feb 15 2022 08:58:33 %S A128186 1,1,1,2,0,1,1,2,0,1,2,0,1,0,1,2,2,1,1,0,1,2,0,1,0,1,0,1,1,3,0,2,0,1, %T A128186 0,1,3,0,2,0,1,0,1,0,1,2,2,1,1,1,1,0,1,0,1 %N A128186 A051731 * A128174. %C A128186 Left column = A001227. %C A128186 Row sums = A079247: (1, 2, 3, 4, 4, 7, 5, 8, 8, 10, ...). %C A128186 A128187 = A128174 * A051731. %F A128186 A051731 * A128174 as infinite lower triangular matrices. %e A128186 First few rows of the triangle: %e A128186 1; %e A128186 1, 1; %e A128186 2, 0, 1; %e A128186 1, 2, 0, 1; %e A128186 2, 0, 1, 0, 1; %e A128186 2, 2, 1, 1, 0, 1; %e A128186 2, 0, 1, 0, 1, 0, 1; %e A128186 ... %Y A128186 Cf. A128174, A051731, A128187, A079247, A001227. %K A128186 nonn,tabl %O A128186 1,4 %A A128186 _Gary W. Adamson_, Feb 17 2007