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 A130298 #4 Feb 20 2022 14:49:15 %S A130298 1,5,2,12,4,3,22,6,5,4,35,8,7,6,5,51,10,9,8,7,6,70,12,11,10,9,8,7,92, %T A130298 14,13,12,11,10,9,8,117,16,15,14,13,12,11,10,9,145,18,17,16,15,14,13, %U A130298 12,11,10 %N A130298 A051340 * A130296. %C A130298 Row sums = A003215: (1, 7, 19, 37, 61, 91, ...). %C A130298 Left border = A000326: (1, 5, 12, 22, 35, ...). %C A130298 A130299 = A130296 * A051340. %F A130298 A051340 * A130296 as infinite lower triangular matrices. %e A130298 First few rows of the triangle: %e A130298 1; %e A130298 5, 2; %e A130298 12, 4, 3; %e A130298 22, 6, 5, 4; %e A130298 35, 8, 7, 6, 5; %e A130298 51, 10, 9, 8, 7, 6; %e A130298 70, 12, 11, 10, 9, 8, 7; %e A130298 ... %Y A130298 Cf. A051340, A130296, A003215, A000326. %K A130298 nonn,tabl %O A130298 1,2 %A A130298 _Gary W. Adamson_, May 20 2007