OFFSET
1,1
COMMENTS
The large constant is constructed from 3*5*7*11*13*17*19*23*29*31 = 100280245065.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
EXAMPLE
The prime 41 is in the sequence because 2*41+100280245065 = 100280245147 is also prime.
MATHEMATICA
a=3*5*7*11*13*17*19*23*29*31; c=0; lst={}; Do[p=Prime[n]; If[PrimeQ[2*p+a], AppendTo[lst, p], c++ ], {n, 6!}]; lst
With[{c=Times@@Prime[Range[2, 11]]}, Select[Prime[Range[250]], PrimeQ[ 2#+c]&]] (* Harvey P. Dale, Nov 01 2011 *)
Select[Prime[Range[300]], PrimeQ[2 # + 100280245065]&] (* Vincenzo Librandi, Apr 15 2013 *)
PROG
(Magma) [p: p in PrimesUpTo(1400) | IsPrime(2*p + 100280245065)]; // Vincenzo Librandi, Apr 15 2013
CROSSREFS
KEYWORD
nonn,less
AUTHOR
Vladimir Joseph Stephan Orlovsky, Jun 14 2009
EXTENSIONS
Definition reworded by R. J. Mathar, Oct 02 2009
STATUS
approved