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 A134447 #6 Mar 25 2022 00:33:24 %S A134447 1,1,2,4,2,3,4,6,3,4,9,6,8,4,5,9,12,8,10,5,6,16,12,15,10,12,6,7,16,20, %T A134447 15,18,12,14,7,8,25,20,24,18,21,14,16,8,9,25,30,24,28,21,24,16,18,9,10 %N A134447 A002260 * A128174. %C A134447 Row sums = A049778: (1, 3, 9, 17, 32, 50, 78, ...). %F A134447 A002260 * A128174 as infinite lower triangular matrices. %e A134447 First few rows of the triangle: %e A134447 1; %e A134447 1, 2; %e A134447 4, 2, 3; %e A134447 4, 6, 3, 4; %e A134447 9, 6, 8, 4, 5; %e A134447 9, 12, 8, 10, 5, 6; %e A134447 16, 12, 15, 10, 12, 6, 7; %e A134447 ... %Y A134447 Cf. A128174, A002260, A049778. %K A134447 nonn,tabl %O A134447 1,3 %A A134447 _Gary W. Adamson_, Oct 25 2007