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 A051069 #10 Feb 16 2019 12:11:24 %S A051069 0,1,0,0,1,0,0,1,0,1,0,1,1,0,1,1,0,1,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0, %T A051069 1,0,1,0,1,1,0,1,1,0,1,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1,0,1,1,0, %U A051069 1,1,0,1,0,1,0,0,1,0,0,1,0,1,0,1,1,0,1,1,0,1,0,1,0 %N A051069 A051068 read mod 2. %Y A051069 Cf. A014578, A051068. %K A051069 nonn %O A051069 0,1 %A A051069 _N. J. A. Sloane_, _Gary W. Adamson_