OFFSET
1,2
COMMENTS
-2 is a primitive root mod (8*n+7).
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[0, 1500], PrimeQ[4 # + 3]&&PrimeQ[8 # + 7] &]
PROG
(Magma) [n: n in [0..1000] | IsPrime(4*n+3) and IsPrime(8*n+7)];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jun 25 2014
STATUS
approved