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 A128973 #4 Sep 08 2013 13:31:19
%S A128973 1,0,1,1,1,1,1,1,0,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,1,1,1,0,1,1,0,1,1,
%T A128973 0,1,1,0,0,0,0,0,0,1,1,0,1,0,0,0,0,1,0,0,1,1,1,1,0,0,1,1,1,1,1,1,1,1,
%U A128973 0,1,1,0,1,1,1,1,0,1,1,0,0,0,0,0,0,1,1,0,0,1,1,0,1,0,0,0,0,1,0,0,1,1,0,0,1
%N A128973 Triangle formed by reading A038622 mod 2 .
%C A128973 Also triangle formed by reading triangles A089942, A124733, A126331, A126791, A126970 modulo 2 .
%F A128973 T(n,0)=A035263(n). Sum_{k, 0<=k<=n}T(n,k)*(-1)^k = (-1)^n .
%e A128973 Triangle begins:
%e A128973 1;
%e A128973 0, 1;
%e A128973 1, 1, 1;
%e A128973 1, 1, 0, 1;
%e A128973 1, 0, 0, 1, 1;
%e A128973 0, 1, 1, 0, 0, 1;
%e A128973 1, 0, 0, 1, 1, 1, 1;
%e A128973 0, 1, 1, 0, 1, 1, 0, 1;
%e A128973 1, 0, 0, 0, 0, 0, 0, 1, 1;
%K A128973 nonn,tabl
%O A128973 0,1
%A A128973 _Philippe Deléham_, Apr 28 2007