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 A184082 #11 Feb 15 2014 16:07:24
%S A184082 6,3,0,3,8,4,4,0,5,9,9,1,3,6,6,1,5,4,6,0,2,2,2,5,8,2,2,9,3,1,3,2,9,2,
%T A184082 4,6,6,9,4,9,4,1,4,4,8,4,6,7,2,9,9,2,9,5,6,2,0,1,8,1,0,7,1,4,3,0,0,8,
%U A184082 6,8,0,1,5,2,2,2,2,5,2,3,9,7,2,2,3,4,0,9,9
%N A184082 Decimal expansion of product_{p=primes} (1-1/2^p).
%F A184082 Equals product_{p in A000040} (1-2^(-p)) = sum_{n>=0} A046675(n)/2^n.
%e A184082 (1-1/2^2) *(1-1/2^3) *(1-1/2^5) *(1-1/2^7) *(1-1/2^11) *.... = 0.63038440599136615460222582...
%t A184082 RealDigits[Times@@(1-1/2^Prime[Range[100]]),10,120][[1]] (* _Harvey P. Dale_, Jun 26 2011 *)
%K A184082 cons,nonn
%O A184082 0,1
%A A184082 _R. J. Mathar_, Jan 09 2011