A142061 Primes congruent to 20 mod 33.

53, 251, 317, 383, 449, 647, 911, 977, 1109, 1307, 1373, 1439, 1571, 1637, 1901, 2099, 2297, 2693, 2957, 3023, 3089, 3221, 3617, 3881, 3947, 4013, 4079, 4211, 4409, 4673, 4871, 4937, 5003, 5333, 5399, 5531, 5861, 5927, 6257, 6323, 6389, 6521, 6653, 6719

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 02 2016

Mathematica

Select[Range[20, 20000, 33], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 25 2011 *)
Select[Prime[Range[3000]], MemberQ[{20}, Mod[#, 33]]&] (* Vincenzo Librandi, Aug 18 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(8000) | p mod 33 eq 20 ]; // Vincenzo Librandi, Aug 18 2012
(PARI) is(n)=isprime(n) && n%33==20 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040.

Sequence in context: A084669 A256339 A142357 * A107150 A036911 A241488

Adjacent sequences: A142058 A142059 A142060 * A142062 A142063 A142064

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved