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 A094217 #5 Mar 30 2012 18:39:23 %S A094217 0,1,1,0,1,1,0,1,1,0,1,0,1,1,1,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0,0,1,0,1, %T A094217 1,1,1,1,1,0,1,0,0,1,1,1,1,1,0,0,0,0,1,0,1,1,1,1,0,1,1,1,1,1,1,1,1,0, %U A094217 1,0,0,1,0,0,0,1,1,1,1,1,1,0,0,0,0,0,1,0,1,1,1,1,1,1,1,1,0,1,1,0,1,0,0,1,1 %N A094217 First differences of A093878. %F A094217 a(n)=A093878(n+1)-A093878(n) %K A094217 nonn %O A094217 1,1 %A A094217 _Benoit Cloitre_, May 27 2004