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 A191333 #14 May 13 2013 01:49:36
%S A191333 1,1,2,4,8,4,7,6,0,7,4,3,6,7,5,7,0,8,6,3,4,5,5,6,8,6,8,2,9,4,4,8,0,4,
%T A191333 9,3,4,6,3,4,3,8,6,4,7,4,8,6,5,5,4,2,9,8,8,1,3,6,5,6,3,7,4,5,5,7,1,8,
%U A191333 5,3,6,9,3,3,4,2,3,2,4,3,3,1,5,1,1,6,8,6,2,8,7,2,5,5,3,5,6,0,6,0
%N A191333 Decimal representation of sum{(1/3)^A191331(k): k>=1}.
%C A191333 See A191335, A191331, and A191332.
%e A191333 0.11248476074367570863455686829448049346...
%t A191333 (See A191329.)
%o A191333 (PARI) sum(k=1,2,(1/3.)^(1.<<(2^(2^k-1))+1)) \\ _Charles R Greathouse IV_, Jun 30 2011
%Y A191333 Cf. A191329, A191331, A191332.
%K A191333 nonn,cons
%O A191333 0,3
%A A191333 _Clark Kimberling_, May 31 2011