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 A134676 #8 Mar 26 2022 10:21:52 %S A134676 1,3,2,3,0,3,6,6,0,4,3,0,0,0,5,9,6,9,0,0,6,3,0,0,0,0,0,7,10,12,0,12,0, %T A134676 0,0,8,6,0,9,0,0,0,0,0,9,9,6,0,0,15,0,0,0,0,10 %N A134676 A127172 * A127648. %C A134676 Left column = A007425: (1, 3, 3, 6, 3, 9, 3, 10, ...). %C A134676 Row sums = A007430: (1, 5, 6, 16, 8, 30, 10, 42, ...). %F A134676 A127172 * A127648 = A051731^3 * A127648 as infinite lower triangular matrices. %e A134676 First few rows of the triangle: %e A134676 1; %e A134676 3, 2; %e A134676 3, 0, 3; %e A134676 6, 6, 0, 4; %e A134676 3, 0, 0, 0, 5; %e A134676 9, 6, 9, 0, 0, 6; %e A134676 3, 0, 0, 0, 0, 0, 7; %e A134676 ... %Y A134676 Cf. A127172, A051731, A127648, A007430, A007425. %K A134676 nonn,tabl,more %O A134676 1,2 %A A134676 _Gary W. Adamson_, Nov 05 2007