OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[21, 30000, 118], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jul 15 2011 *)
Select[Prime[Range[2400]], MemberQ[{21}, Mod[#, 59]] &] (* Vincenzo Librandi, Sep 03 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(20000) | p mod 59 eq 21 ]; // Vincenzo Librandi, Sep 03 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved