OFFSET
1,1
COMMENTS
Primes congruent to (5,13) mod 18. - Vincenzo Librandi, Aug 14 2012
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Emma Lehmer, On special primes, Pac. J. Math., 118 (1985), 471-478.
MATHEMATICA
Select[Prime[Range[4000]], MemberQ[{5, 13}, Mod[#, 18]]&] (* Vincenzo Librandi, Aug 14 2012 *)
PROG
(Magma) [ p: p in PrimesUpTo(1300) | p mod 18 in {5, 13} ]; // Vincenzo Librandi, Aug 14 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 22 2007
STATUS
approved