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 A134066 #5 Mar 25 2022 00:36:44 %S A134066 1,2,4,2,8,4,2,12,12,4,2,16,24,16,4,2,20,40,40,20,4,2,24,60,80,60,24, %T A134066 4,2,28,84,140,140,84,28,4,2,32,112,224,280,224,112,32,42,36,144,336, %U A134066 504,504,336,144,36,4 %N A134066 Triangle = A134060 + A124928 - A007318. %C A134066 Row sums = A134067: (1, 6, 14, 30, 62, 126, ...). %F A134066 Triangle as infinite lower triangular matrix, (A134060 + A124928 - A007318). %e A134066 First few rows of the triangle: %e A134066 1; %e A134066 2, 4; %e A134066 2, 8, 4; %e A134066 2, 12, 12, 4; %e A134066 2, 16, 24, 16, 4; %e A134066 2, 20, 40, 40, 20, 4; %e A134066 ... %Y A134066 Cf. A134060, A124928, A134067. %K A134066 nonn,tabl %O A134066 0,2 %A A134066 _Gary W. Adamson_, Oct 06 2007