OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Prime[Range[3000]], MemberQ[{20}, Mod[#, 61]] &] (* Vincenzo Librandi, Sep 05 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(25000) | p mod 61 eq 20]; // Vincenzo Librandi, Sep 05 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved