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 A130304 #14 Jul 28 2023 10:38:42 %S A130304 1,1,1,0,1,1,0,0,1,1,1,0,0,1,1,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,1,0,0, %T A130304 1,1,1,0,0,1,1,0,0,1,1,1,1,0,0,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,1,0,0, %U A130304 1,1,0,0,1,1,0,0,1,1,1,0,0,1,1,0,0,1,1,0,0,1,1 %N A130304 Triangle, (1,1,0,0,1,1,0,0,...) in every column. %e A130304 First few rows of the triangle: %e A130304 1; %e A130304 1, 1; %e A130304 0, 1, 1; %e A130304 0, 0, 1, 1; %e A130304 1, 0, 0, 1, 1; %e A130304 1, 1, 0, 0, 1, 1; %e A130304 ... %Y A130304 Cf. A004524 (row sums), A130305 (binomial transform). %K A130304 nonn,tabl,easy %O A130304 1,1 %A A130304 _Gary W. Adamson_, May 20 2007 %E A130304 Missing 0 inserted at a(30) and more terms from _Georg Fischer_, Jul 28 2023