A141948 Primes congruent to 1 mod 27.

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

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 *)
Select[Range[1, 6000, 27], PrimeQ] (* Harvey P. Dale, Jan 16 2023 *)

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