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 A191334 #4 Mar 30 2012 18:57:32
%S A191334 1,2,8,0,4,8,7,8,0,3,9,3,3,7,1,6,5,4,6,9,2,9,5,8,2,6,5,0,9,8,6,8,7,6,
%T A191334 5,5,3,7,5,7,5,1,6,0,8,8,3,6,5,6,0,6,8,0,5,1,1,8,8,4,0,4,0,9,5,6,8,6,
%U A191334 6,3,2,2,5,0,4,3,2,0,2,2,3,8,5,3,8,8,1,6,6,9,8,2,3,3,9,9,8,6,6,8
%N A191334 Decimal expansion of sum{(1/3)^A005653(k): k>=1}.
%C A191334 sum{(1/3)^A005653(k)}+sum{(1/3)^A005652(k)}=1/2.
%e A191334 0.128048780393371654692958265098687655...
%t A191334 (See A191329.)
%Y A191334 Cf. A191329, A191335.
%K A191334 nonn,cons
%O A191334 1,2
%A A191334 _Clark Kimberling_, May 31 2011