A142608 Primes congruent to 9 mod 55.

229, 449, 1109, 1439, 1549, 1879, 2099, 2539, 3089, 3529, 4079, 4409, 4519, 5179, 5399, 5839, 6389, 6719, 6829, 7159, 7489, 8039, 8369, 8699, 9029, 9689, 10459, 10789, 11119, 11779, 12109, 12329, 12659, 13099, 13649, 13759, 14419, 14639, 14969, 15299, 15629

Offset

1,1

Links

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

Formula

a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 04 2016

Mathematica

Select[Prime[Range[2500]], MemberQ[{9}, Mod[#, 55]] &] (* Vincenzo Librandi, Aug 31 2012 *)
Select[Range[9, 16000, 55], PrimeQ] (* Harvey P. Dale, Mar 18 2018 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 55 eq 9]; // Vincenzo Librandi, Aug 31 2012
(PARI) is(n)=isprime(n) && n%55==9 \\ Charles R Greathouse IV, Jul 04 2016

Crossrefs

Cf. A000040.

Sequence in context: A142779 A139512 A142263 * A210514 A142665 A124684

Adjacent sequences: A142605 A142606 A142607 * A142609 A142610 A142611

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved