OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Prime[Range[2000]], PrimeQ[3 #^2 + 3 # + 1] &] (* Vincenzo Librandi, Feb 15 2014 *)
PROG
(Magma) [p: p in PrimesUpTo(2000)| IsPrime(3*p^2+3*p+1)]; // Vincenzo Librandi, Feb 15 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 19 2009
STATUS
approved