login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Primes of the form q*p+2^p where p is prime, q=3.
8

%I #2 Mar 31 2012 12:38:20

%S 17,47,149,2081,8231,140737488355469,

%T 300613450595050653169853516389035139504087366260264943450533244356122755214669880763353471793250393988087678029

%N Primes of the form q*p+2^p where p is prime, q=3.

%t lst={};Do[p=Prime[n];If[PrimeQ[p=3*p+2^p],AppendTo[lst,p]],{n,5!}];lst

%Y Cf. A057664

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Jan 28 2009