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 A134312 #6 Mar 25 2022 00:35:38 %S A134312 1,1,1,0,1,2,0,0,2,4,0,0,0,4,8,0,0,0,0,8,16,0,0,0,0,0,16,32,0,0,0,0,0, %T A134312 0,32,64 %N A134312 A097806 * A134309. %C A134312 A134313 = A134309 * A097806. %F A134312 A097806 * A134309 as infinite lower triangular matrices, where A097806 = the pairwise operator. Infinite lower triangular matrix with (1, 1, 2, 4, 8, 16, ...) in the main and subdiagonals. %e A134312 First few rows of the triangle: %e A134312 1; %e A134312 1, 1; %e A134312 0, 1, 2; %e A134312 0, 0, 2, 4; %e A134312 0, 0, 0, 4, 8; %e A134312 0, 0, 0, 0, 8, 16; %e A134312 ... %Y A134312 Cf. A134309, A097806, A134313. %K A134312 nonn,tabl %O A134312 0,6 %A A134312 _Gary W. Adamson_, Oct 19 2007