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 A102654 #6 Mar 29 2015 16:24:47
%S A102654 0,7,14,8,11,15,8,8,8,12,15,15,15,8,9,8,12,8,12,8,12,15,16,15,8,9,15,
%T A102654 8,9,15,8,9,8,12,8,13,8,12,15,16,8,12,15,16,8,12,15,16,15,8,9,15,8,10,
%U A102654 15,8,9,8,12,8,13,15,8,9,8,12,8,13,15,8,9,8,12,8,13,8,12,15,16,8,12,15,8,7
%N A102654 Add 7 to each of the preceding digits, beginning with 0.
%e A102654 Add 7 to the first "7" gives 14
%e A102654 Add 7 to the "1" of this 14 gives 8; and adding 7 to the "4" of this 14 gives 11.
%t A102654 Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[x] + 7]], {0}, 10]] (* _Robert G. Wilson v_, Feb 04 2005 *)
%Y A102654 Cf. A103693, A103694, A103695, A103696, A103697, A103698, A103699, A103700.
%K A102654 base,easy,nonn
%O A102654 0,2
%A A102654 _Alexandre Wajnberg_, Feb 02 2005
%E A102654 More terms from _Robert G. Wilson v_, Feb 04 2005