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 A103696 #3 Mar 30 2012 17:31:12
%S A103696 0,4,8,12,5,6,9,10,13,5,4,5,7,9,8,9,11,13,12,13,5,5,5,7,5,6,5,7,9,9,9,
%T A103696 11,9,10,9,11,13,13,13,5,5,13,5,4,13,5,5,5,7,5,7,5,7,9,9,5,7,9,8,5,7,
%U A103696 9,9,9,11,9,11,9,11,13,13,9,11,13,12,9,11,13,13,13,5,5,13,5,5,13,5,5,5,7
%N A103696 Add 4 to each of the preceding digits, beginning with 0.
%t A103696 Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[x] + 4]], {0}, 14]]
%Y A103696 Cf. A102654, A103693, A103694, A103695, A103697, A103698, A103699, A103700.
%K A103696 base,nonn
%O A103696 0,2
%A A103696 _Robert G. Wilson v_, Feb 12 2005