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 A104637 #5 Oct 05 2013 11:54:47 %S A104637 1,0,0,0,0,0,0,0,1,1,0,0,1,1,1,0,0,1,1,0,0,0,1,1,0,1,1,1,1,0,1,0,0,0, %T A104637 1,0,0,1,1,0,0,1,0,0,0,0,1,2,2,2,1,1,2,1,1,2,2,1,1,2,2,1,1,0,0,0,0,0, %U A104637 1,1,0,0,1,0,0,1,1,0,2,2,1,2,1,1,1,2,2,1,2,2,2,1,2,1,1,1,1,1,1,1 %N A104637 Number of even digits in n-th prime. %F A104637 a(n) = A196563(A000040(n)). - _Michel Marcus_, Oct 05 2013 %Y A104637 Number of odd digits in n-th prime gives A104638. %K A104637 easy,nonn,base %O A104637 1,48 %A A104637 _Zak Seidov_, Mar 18 2005