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 A117113 #2 Mar 31 2012 20:24:44 %S A117113 2,2,4,3,3,2,4,4,2,1,4,2,5,3,2,2,4,3,2,2,3,2,4 %N A117113 Number of letters not in common with the number before. %F A117113 a(1)=2 from oNE & zerO, a(2)=2 from TWo & One, a(3)=4 from tHREE & Two, a(8)=4 from eIGHT & sEven, etc. %e A117113 a(1)=2 from oNE & zerO, a(2)=2 from TWo & One, a(3)=4 from tHREE & Two, a(8)=4 from eIGHT & sEven, etc. %Y A117113 Cf. A116531. %K A117113 nonn,word %O A117113 0,1 %A A117113 _Rodolfo Kurchan_, Apr 18 2006