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 A130267 #4 Feb 20 2022 14:46:36 %S A130267 1,2,2,2,1,3,3,3,1,4,2,1,1,1,5,4,4,4,1,1,6,2,1,1,1,1,1,7,4,4,2,5,1,1, %T A130267 1,8,3,2,4,1,1,1,1,1,9,4,4,2,2,6,1,1,1,1,10 %N A130267 A051731 * A051340. %C A130267 Row sums = A129235: (1, 4, 6, 11, 10, 20, ...). %C A130267 Left border = A000005, d(n): (1, 2, 2, 3, 2, 4, ...). %F A130267 Inverse Moebius transform of A051340. %e A130267 First few rows of the triangle: %e A130267 1; %e A130267 2, 2; %e A130267 2, 1, 3; %e A130267 3, 3, 1, 4; %e A130267 2, 1, 1, 1, 5; %e A130267 4, 4, 4, 1, 1, 6; %e A130267 2, 1, 1, 1, 1, 1, 7; %e A130267 ... %Y A130267 Cf. A051340, A051731, A000005, A129235. %K A130267 nonn,tabl %O A130267 0,2 %A A130267 _Gary W. Adamson_, May 18 2007