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 A128522 #5 Feb 18 2022 22:20:26 %S A128522 1,0,1,1,1,1,1,1,1,1,2,2,2,1,1,1,1,1,2,1,1,3,3,3,2,2,1,1,2,2,2,2,2,2, %T A128522 1,1,3,3,3,3,3,2,2,1,1,2,2,2,3,2,3,2,2,1,1 %N A128522 A054525 * A128174 * A000012. %C A128522 Row sums = A123323: (1, 1, 3, 4, 8,7, 15, 14, ...). Left column = A083290: (1, 0, 1, 1, 2, 1, 3, 2, 3, 2, ...) A128521 = A128174 * A054525 * A000012. %F A128522 A054525 * A128174 * A000012 as infinite lower triangular matrices. %e A128522 First few rows of the triangle: %e A128522 1; %e A128522 0, 1; %e A128522 1, 1, 1; %e A128522 1, 1, 1, 1; %e A128522 2, 2, 2, 1, 1; %e A128522 1, 1, 1, 2, 1, 1; %e A128522 3, 3, 3, 2, 2, 1, 1; %e A128522 2, 2, 2, 2, 2, 2, 1, 1; %e A128522 3, 3, 3, 3, 3, 2, 2, 1, 1; %e A128522 ... %Y A128522 Cf. A054525, A128174, A000012, A083290, A123323, A128521. %K A128522 nonn,tabl %O A128522 1,11 %A A128522 _Gary W. Adamson_, Mar 07 2007