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 A133735 #5 Mar 23 2022 01:07:20 %S A133735 1,2,0,3,0,1,4,0,2,1,5,0,3,2,2,6,0,4,3,4,2,7,0,5,4,6,4,4,8,0,6,5,8,6, %T A133735 8,4,9,0,7,6,10,8,12,8,7,10,0,8,7,12,10,16,12,14,8 %N A133735 A000012 * A133734. %C A133735 Row sums = A000070: (1, 2, 4, 7, 12, 19, 30, 45, ...). %C A133735 Right border = A002865: (1, 0, 1, 1, 2, 2, 4, 4, 7, 8, ...). %F A133735 A000012 * A133734 as infinite lower triangular matrices. %e A133735 First few rows of the triangle: %e A133735 1; %e A133735 2, 0; %e A133735 3, 0, 1; %e A133735 4, 0, 2, 1; %e A133735 5, 0, 3, 2, 2; %e A133735 6, 0, 4, 3, 4, 2; %e A133735 7, 0, 5, 4, 6, 4, 4; %e A133735 8, 0, 6, 5, 8, 6, 8, 4; %e A133735 9, 0, 7, 6, 10, 8, 12, 8, 7; %e A133735 ... %Y A133735 Cf. A133734, A000070. %K A133735 nonn,tabl %O A133735 0,2 %A A133735 _Gary W. Adamson_, Sep 22 2007