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 A176917 #4 Apr 05 2012 18:16:11 %S A176917 1,1,0,1,1,0,1,0,0,0,1,1,1,0,0,1,0,0,0,0,0,1,1,0,2,0,0,0,1,0,1,0,0,0, %T A176917 0,0,1,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,1,1,2,0,3,0,0,0,0,0,1,0, %U A176917 0,0,0,0,0,0,0,0,0,0 %N A176917 Triangle read by rows, A077049 * the diagonalized version of A002033. %C A176917 Row sums = A002033 starting with offset 1: (1, 1, 2, 1, 3, 1, 4, 2, 3, 1, 8,...) %F A176917 As infinite lower triangular matrices, A077049 * the diagonalized version of %F A176917 A002033: (1, 1, 1, 2, 1, 3, 1, 4, 2,...) as the right border with the rest zeros. %e A176917 First few rows of the triangle = %e A176917 1; %e A176917 1, 0; %e A176917 1, 1, 0; %e A176917 1, 0, 0, 0; %e A176917 1, 1, 1, 0, 0; %e A176917 1, 0, 0, 0, 0, 0; %e A176917 1, 1, 0, 2, 0, 0, 0; %e A176917 1, 0, 1, 0, 0, 0, 0, 0; %e A176917 1, 1, 0, 0, 1, 0, 0, 0, 0; %e A176917 1, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 1, 2, 0, 3, 0, 0, 0, 0, 0; %e A176917 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0; %e A176917 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 0, 2, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 1, 0, 0, 3, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 0, 2, 1, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 1, 1, 1, 2, 0, 3, 0, 4, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0; %e A176917 ... %Y A176917 Cf. A077049, A002033 %K A176917 nonn,tabl %O A176917 1,25 %A A176917 _Gary W. Adamson_ & _Mats Granvik_, Apr 28 2010