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 A103698 #3 Mar 30 2012 17:31:12
%S A103698 0,6,12,7,8,13,14,7,9,7,10,13,15,13,7,6,7,9,7,11,7,9,13,12,13,15,13,7,
%T A103698 7,13,15,7,9,7,8,7,9,7,11,7,9,13,13,7,9,7,11,13,15,13,14,13,15,13,7,7,
%U A103698 13,15,7,9,7,9,13,15,13,7,7,7,9,7,11,7,9,7,10,7,9,7,11,7,9,13,13,7,9,7,11
%N A103698 Add 6 to each of the preceding digits, beginning with 0.
%t A103698 Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[x] + 6]], {0}, 11]]
%Y A103698 Cf. A102654, A103693, A103694, A103695, A103696, A103697, A103699, A103700.
%K A103698 base,nonn
%O A103698 0,2
%A A103698 _Robert G. Wilson v_, Feb 12 2005