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 A133544 #5 Mar 23 2022 01:06:41 %S A133544 1,1,2,1,4,4,1,6,12,7,1,8,24,28,12,1,10,40,70,60,13,1,12,60,140,180, %T A133544 78,14,1,14,84,245,420,273,98,15,1,16,112,392,840,728,392,120,16,1,18, %U A133544 144,588,1512,1638,1176,540,144,18 %N A133544 A007318 * A052474. %C A133544 Right border = A052474: (1, 2, 4, 7, 12, 13, 14, 15, 16, 18, 20, ...). %C A133544 Row sums = A057153: (1, 3, 9, 26, 73, 194, 485, 1150, ...). %F A133544 Binomial transform of A052474 as a diagonalized matrix (A052474 as the diagonal of an infinite lower triangular matrix and the rest zeros). %e A133544 First few rows of the triangle: %e A133544 1; %e A133544 1, 2; %e A133544 1, 4, 4; %e A133544 1, 6, 12, 7; %e A133544 1, 8, 24, 28, 12; %e A133544 1, 10, 40, 70, 60, 13; %e A133544 1, 12, 60, 140, 180, 78, 14; %e A133544 ... %Y A133544 Cf. A052474, A057153. %K A133544 nonn,tabl %O A133544 1,3 %A A133544 _Gary W. Adamson_, Sep 14 2007