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A141948 Primes congruent to 1 mod 27. 3
109, 163, 271, 379, 433, 487, 541, 757, 811, 919, 1297, 1459, 1567, 1621, 1783, 1999, 2053, 2161, 2269, 2377, 2539, 2593, 2647, 2917, 2971, 3079, 3187, 3457, 3511, 3673, 3727, 3889, 3943, 4051, 4159, 4483, 4591, 4861, 4969, 5023, 5077, 5347, 5563, 5779 (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 02 2016

MATHEMATICA

Select[Prime[Range[800]], MemberQ[{1}, Mod[#, 27]] &] (* Vincenzo Librandi, Aug 16 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(7000) | p mod 27 eq 1 ]; // Vincenzo Librandi, Aug 16 2012

(PARI) is(n)=isprime(n) && n%27==1 \\ Charles R Greathouse IV, Jul 02 2016

CROSSREFS

Cf. A000040.

Sequence in context: A161483 A283792 A333743 * A102908 A141998 A061277

Adjacent sequences:  A141945 A141946 A141947 * A141949 A141950 A141951

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified November 26 12:37 EST 2020. Contains 338639 sequences. (Running on oeis4.)