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 A081775 #5 Mar 30 2012 18:39:16 %S A081775 1,6,1,6,7,6,1,6,6,1,6,6,1,5,1,6,6,1,6,7,6,1,6,6,1,5,1,6,7,6,1,6,6,1, %T A081775 5,1,6,6,1,6,6,1,6,7,6,1,6,6,1,5,1,6,7,6,1,6,6,1,6,6,1,5,1,6,6,1,6,7, %U A081775 6,1,5,1,6,6,1,6,7,6,1,6,6,1,5,1,6,6,1,6,6,1,6,7,6,1,6,6,1,5,1,6,7,6,1,6,6 %N A081775 Continued fraction for sum(k>=0,1/7^(2^k-1)). %C A081775 Contains only elements 1<=a(n)<=7 ( but 2,3 and 4 never occur) %Y A081775 Cf. A004200. %K A081775 cofr,nonn %O A081775 1,2 %A A081775 _Benoit Cloitre_, Apr 10 2003