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 A130453 #4 Feb 20 2022 14:57:57 %S A130453 1,2,2,2,4,4,2,4,8,8,2,4,8,16,16,2,4,8,16,32,32,2,4,8,16,32,64,64,2,4, %T A130453 8,16,32,64,128,128 %N A130453 A097806 * A059268. %C A130453 Row sums = A033484: (1, 4, 10, 22, 46, 94, ...). %C A130453 A130459 = A059268 * A097806. %F A130453 A097806 * A059268 as infinite lower triangular matrices. %e A130453 First few rows of the triangle: %e A130453 1; %e A130453 2, 2; %e A130453 2, 4, 4; %e A130453 2, 4, 8, 8; %e A130453 2, 4, 8, 16, 16; %e A130453 2, 4, 8, 16, 32, 32; %e A130453 ... %Y A130453 Cf. A097806, A059268, A033484, A130459. %K A130453 nonn,tabl %O A130453 1,2 %A A130453 _Gary W. Adamson_, May 26 2007