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A141961 Primes congruent to 20 mod 27. 1
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 (list; graph; refs; listen; history; text; internal format)
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 * A142661 A216067 A124096

Adjacent sequences:  A141958 A141959 A141960 * A141962 A141963 A141964

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified December 7 09:29 EST 2016. Contains 278849 sequences.