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 A132819 #6 Mar 06 2022 02:04:05 %S A132819 1,1,3,1,9,6,1,18,36,10,1,30,120,100,15,1,45,300,500,225,21,1,63,630, %T A132819 1750,1575,441,28,1,84,1176,4900,7350,4116,784,36,1,108,2016,11760, %U A132819 26460,24696,9408,1296,45,1,135,3240,25200,79380,111132,70560,19440 %N A132819 A001263 * A127773. %C A132819 Row sums = A132820: (1, 4, 16, 65, 266, ...). %F A132819 A001263 * A127773 as infinite lower triangular matrices. %e A132819 First few rows of the triangle are: %e A132819 1; %e A132819 1, 3; %e A132819 1, 9, 6; %e A132819 1, 18, 36, 10; %e A132819 1, 30, 120, 100, 15; %e A132819 1, 45, 300, 500, 225, 21; %e A132819 ... %Y A132819 Cf. A001263, A127773, A132820. %K A132819 nonn,tabl %O A132819 1,3 %A A132819 _Gary W. Adamson_, Sep 02 2007