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 A184084 #7 Jul 23 2024 15:43:26
%S A184084 6,8,3,7,9,2,8,4,2,3,5,9,4,7,4,3,6,8,9,9,4,3,6,3,6,4,3,4,1,0,7,6,3,4,
%T A184084 4,4,3,6,8,2,2,1,0,8,7,5,8,1,8,1,7,3,5,2,6,2,9,4,7,1,2,9,8,1,0,5,5,9,
%U A184084 9,0,4,2,3,5,5,6,5,5,7,7,7
%N A184084 Decimal expansion of product_{p=primes} (1-1/(2^p+1)).
%C A184084 Inverse of the constant A184083.
%F A184084 Equals product_{p in A000040} (1-1/(2^p+1)) = 1/ product_p (1+2^(-p)) = product_{n>=1} (1-1/A098640(n)).
%e A184084 (1-1/5) *(1-1/9) *(1-1/33) * (1-1/129) *(1-1/2049)* ... = 0.6837928423594743689943636...
%t A184084 RealDigits[Times@@Table[1-1/(2^p+1),{p,Prime[Range[1000]]}],10,100][[1]] (* _Harvey P. Dale_, Jul 23 2024 *)
%K A184084 cons,nonn
%O A184084 0,1
%A A184084 _R. J. Mathar_, Jan 09 2011