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A142608 Primes congruent to 9 mod 55. 1
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 (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) ~ 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

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Last modified October 26 02:14 EDT 2021. Contains 348256 sequences. (Running on oeis4.)