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 A134352 #7 Mar 25 2022 02:29:47 %S A134352 1,0,2,4,0,4,0,8,0,8,16,0,16,0,16,0,32,0,32,0,32,64,0,64,0,64,0,64,0, %T A134352 128,0,128,0,128,0,128,256,0,256,0,256,0,256,0,256,0,512,0,512,0,512, %U A134352 0,512,0,512 %N A134352 A130123 * A128174. %C A134352 Row sums = A134353. %F A134352 A130123 * A128174 as infinite lower triangular matrices. %F A134352 Triangle read by rows: even n-th row = n+1 terms of (2^n, 0, 2^n, ...); odd n-th row = n+1 terms of (0, 2^n, 0, 2^n, ...). %e A134352 First few rows of the triangle: %e A134352 1; %e A134352 0, 2; %e A134352 4, 0, 4; %e A134352 0, 8, 0, 8; %e A134352 16, 0, 16, 0, 16; %e A134352 0, 32, 0, 32, 0, 32; %e A134352 ... %Y A134352 Cf. A130123, A128174, A134353. %K A134352 nonn,tabl %O A134352 0,3 %A A134352 _Gary W. Adamson_, Oct 21 2007