OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Prime[Range[500]], PrimeQ[3#^2+3#-1]&] (* Harvey P. Dale, Jul 24 2011 *)
PROG
(Magma) [p: p in PrimesUpTo(2000) | IsPrime(3*p^2+3*p-1)]; // Vincenzo Librandi, Dec 31 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 19 2009
STATUS
approved