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 A134317 #14 Sep 01 2024 13:56:57 %S A134317 1,0,1,1,0,2,0,1,0,4,1,0,2,0,8,0,1,0,4,0,16,1,0,2,0,8,0,32,0,1,0,4,0, %T A134317 16,0,64,1,0,2,0,8,0,32,0,128,0,1,0,4,0,16,0,64,0,256 %N A134317 Triangle, A128174 * A134309 as infinite lower triangular matrices. %C A134317 Is this the same as A123641? - _R. J. Mathar_, Mar 28 2012 %F A134317 T(n,k) = 0 if n+k odd, else T(n,1) =1, T(n,k)=2^(k-2) if k>=2. - _R. J. Mathar_, Sep 01 2024 %e A134317 First few rows of the triangle are: %e A134317 1; %e A134317 0, 1; %e A134317 1, 0, 2; %e A134317 0, 1, 0, 4; %e A134317 1, 0, 2, 0, 8; %e A134317 0, 1, 0, 4, 0, 16; %e A134317 1, 0, 2, 0, 8, 0, 32; %e A134317 0, 1, 0, 4, 0, 16, 0, 64; %e A134317 ... %Y A134317 Cf. A128174, A134309, A001045 (row sums). %K A134317 nonn,tabl,easy %O A134317 1,6 %A A134317 _Gary W. Adamson_, Oct 19 2007