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 A067461 #5 Mar 30 2012 18:38:50 %S A067461 0,1,2,1,1,2,1,1,1,0,1,2,0,1,1,1,1,2,1,1,2,1,1,1,1,0,1,1,0,0,1,1,0,1, %T A067461 1,1,2,1,1,0,1,0,1,2,1,1,1,1,1,0,1,1,1,1,0,1,1,1,2,0,1,1,1,1,2,0,1,1, %U A067461 1,1,0,1,1,0,1,1,2,2,0,0,1,2,1,0,1,1,1,2,2,1,1,1,1,1,1,1,2,1,1,2,1,1,1,2,1 %N A067461 mu(prime(n)+1)+1. %K A067461 easy,nonn %O A067461 1,3 %A A067461 _Benoit Cloitre_, Feb 23 2002