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 A050606 #3 May 01 2014 02:47:40 %S A050606 0,2,1,1,0,3,2,2,0,2,1,1,0,4,3,3,0,2,1,1,0,3,2,2,0,2,1,1,0,5,4,4,0,2, %T A050606 1,1,0,3,2,2,0,2,1,1,0,4,3,3,0,2,1,1,0,3,2,2,0,2,1,1,0,6,5,5,0,2,1,1, %U A050606 0,3,2,2,0,2,1,1,0,4,3,3,0 %N A050606 Column/row 3 of A050602: a(n) = add3c(n,3). %K A050606 nonn %O A050606 0,2 %A A050606 _Antti Karttunen_, Jun 22 1999