OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) ~ 20n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Range[13, 20000, 33], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 25 2011 *)
Select[Prime[Range[3000]], MemberQ[{13}, Mod[#, 33]]&] (* Vincenzo Librandi, Aug 18 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(8000) | p mod 33 eq 13 ]; // Vincenzo Librandi, Aug 18 2012
(PARI) is(n)=isprime(n) && n%33==13 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved