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 A127972 #2 Mar 30 2012 18:59:19 %S A127972 1,1,1,1,0,1,1,0,0,1,0,0,1,0,1,1,0,1,0,1,1,0,0,1,0,0,0,1,1,0,0,0,0,0, %T A127972 0,1,0,0,0,0,1,0,0,0,1,1,0,1,0,0,0,0,0,1,1,0,0,0,0,1,0,1,0,1,0,1,1,0, %U A127972 0,0,1,0 %N A127972 Number triangle A127969 modulo 2. %C A127972 Row sums are A127973. %e A127972 Triangle begins %e A127972 1, %e A127972 1, 1, %e A127972 1, 0, 1, %e A127972 1, 0, 0, 1, %e A127972 0, 0, 1, 0, 1, %e A127972 1, 0, 1, 0, 1, 1, %e A127972 0, 0, 1, 0, 0, 0, 1, %e A127972 1, 0, 0, 0, 0, 0, 0, 1, %e A127972 0, 0, 0, 0, 1, 0, 0, 0, 1, %e A127972 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, %e A127972 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, %e A127972 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, %e A127972 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1 %K A127972 nonn,tabl %O A127972 0,1 %A A127972 _Paul Barry_, Feb 09 2007