A141961 Primes congruent to 20 mod 27.

47, 101, 263, 317, 479, 587, 641, 857, 911, 1019, 1181, 1289, 1451, 1559, 1613, 1667, 1721, 2099, 2153, 2207, 2423, 2477, 2531, 2693, 2801, 2909, 2963, 3449, 3557, 3719, 3881, 3989, 4259, 4421, 4583, 4637, 4691, 4799, 5231, 5393, 5501, 5717, 5879, 5987

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) ~ 18n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[800]], Mod[#, 27]==20&]  (* Harvey P. Dale, Mar 23 2011 *)

Prog

(Magma) [p: p in PrimesUpTo(7000) | p mod 27 eq 20 ]; // Vincenzo Librandi, Aug 16 2012
(PARI) is(n)=isprime(n) && n%27==20 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A155844 A245688 A211331 * A357746 A142661 A216067

Adjacent sequences: A141958 A141959 A141960 * A141962 A141963 A141964

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved