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 A137633 #8 Apr 02 2022 10:10:20 %S A137633 1,2,1,4,1,1,7,2,1,1,12,3,1,1,1,19,5,2,1,1,1,30,7,3,1,1,1,1,45,11,4,2, %T A137633 1,1,1,1,67,15,6,3,1,1,1,1,1,97,22,8,4,2,1,1,1,1,1,139,30,11,5,3,1,1, %U A137633 1,1,1,1 %N A137633 Triangle read by rows, A000012 * A026794. %C A137633 Left border = A000070: (1, 2, 4, 7, 12, 19, 30, 45, ...). %C A137633 Second column = A000041, the partition numbers: (1, 1, 2, 3, 5, 7, 11, ...). %C A137633 Row sums = A016905: (1, 3, 6, 11, 18, 29, 44, ...). %F A137633 A000012 * A026794 as infinite lower triangular matrices. %e A137633 First few rows of the triangle: %e A137633 1; %e A137633 2, 1; %e A137633 4, 1, 1; %e A137633 7, 2, 1, 1; %e A137633 12, 3, 1, 1, 1; %e A137633 19, 5, 2, 1, 1, 1; %e A137633 30, 7, 3, 1, 1, 1, 1; %e A137633 ... %Y A137633 Cf. A000041, A000070, A016905, A026794. %K A137633 nonn,tabl %O A137633 1,2 %A A137633 _Gary W. Adamson_, Jan 31 2008