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 A136787 #14 Apr 02 2022 08:20:23 %S A136787 1,1,1,2,2,1,4,4,4,1,9,9,9,7,1,21,21,21,21,11,1,51,51,51,51,46,16,1, %T A136787 127,127,127,127,127,92,22,1,323,323,323,323,323,309,169,29,1,835,835, %U A136787 835,835,835,835,709,289,37,1 %N A136787 Triangle read by rows: A107131 * A000012. %C A136787 Row sums = A005773 starting (1, 2, 5, 13, 35, 96, 267, ...). %C A136787 Leftmost column = A001006: (1, 1, 2, 4, 9, 21, 51, ...). %C A136787 A136788 = A000012 * A107131. %F A136787 A107131 * A000012 as infinite lower triangular matrices. %e A136787 First few rows of the triangle: %e A136787 1; %e A136787 1, 1; %e A136787 2, 2, 1; %e A136787 4, 4, 4, 1; %e A136787 9, 9, 9, 7, 1; %e A136787 21, 21, 21, 21, 11, 1; %e A136787 51, 51, 51, 51, 46, 16, 1; %e A136787 127, 127, 127, 127, 127, 92, 22, 1; %e A136787 ... %Y A136787 Cf. A005773, A001006, A136788. %K A136787 nonn,tabl %O A136787 1,4 %A A136787 _Gary W. Adamson_, Jan 21 2008