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 A103700 #3 Mar 30 2012 17:31:12
%S A103700 0,9,18,10,17,10,9,10,16,10,9,18,10,9,10,15,10,9,18,10,17,10,9,18,10,
%T A103700 9,10,14,10,9,18,10,17,10,9,10,16,10,9,18,10,17,10,9,18,10,9,10,13,10,
%U A103700 9,18,10,17,10,9,10,16,10,9,18,10,9,10,15,10,9,18,10,17,10,9,10,16,10,9
%N A103700 Add 9 to each of the preceding digits, beginning with 0.
%t A103700 Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[x] + 9]], {0}, 9]]
%Y A103700 Cf. A102654, A103693, A103694, A103695, A103696, A103697, A103698, A103699.
%K A103700 base,nonn
%O A103700 0,2
%A A103700 _Robert G. Wilson v_, Feb 12 2005