This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A184083 Decimal expansion of product_{p=primes} (1+1/2^p). 1

%I

%S 1,4,6,2,4,3,1,2,1,9,0,0,6,9,5,9,8,0,1,3,5,7,2,2,9,0,4,0,1,8,9,7,7,7,

%T 0,5,7,4,2,5,6,5,7,5,7,5,8,0,8,7,7,8,3,2,0,1,1,6,6,9,4,2,9,9,3,1,0,3,

%U 3,8,8,9,7,7,9,3,9,7,6

%N Decimal expansion of product_{p=primes} (1+1/2^p).

%C Inverse of the constant A184084.

%F Equals product_{p in A000040} (1+2^(-p)) = sum_{n>=0} A000586(n)/2^n.

%e (1+1/2^2) *(1+1/2^3) *(1+1/2^5) *(1+1/2^7) *(1+1/2^11)* .... = 1.4624312190069598013...

%t RealDigits[Times@@(1+1/2^Prime[Range[100]]),10,120][[1]] (* _Harvey P. Dale_, Sep 28 2013 *)

%K cons,nonn

%O 1,2

%A _R. J. Mathar_, Jan 09 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 18 05:18 EDT 2019. Contains 328146 sequences. (Running on oeis4.)