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 A081771 #10 Sep 20 2015 07:59:21
%S A081771 1,2,1,2,3,2,1,2,2,1,2,2,1,1,1,2,2,1,2,3,2,1,2,2,1,1,1,2,3,2,1,2,2,1,
%T A081771 1,1,2,2,1,2,2,1,2,3,2,1,2,2,1,1,1,2,3,2,1,2,2,1,2,2,1,1,1,2,2,1,2,3,
%U A081771 2,1,1,1,2,2,1,2,3,2,1,2,2
%N A081771 Continued fraction for Sum_{k>=0} 1/3^(2^k-1).
%C A081771 Contains only elements 1 <= a(n) <= 3. See Judnick, example 12.
%H A081771 S. W. Judnick, <a href="http://conservancy.umn.edu/handle/11299//156764">Patterns in continued fraction expansions</a>, Thesis submitted to the faculty of the graduate school of the University of Minnesota, May 2013.
%Y A081771 Cf. A004200, A006466.
%K A081771 cofr,nonn
%O A081771 1,2
%A A081771 _Benoit Cloitre_, Apr 10 2003