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A142171 Primes congruent to 20 mod 39. 1
59, 137, 293, 449, 683, 761, 839, 1151, 1229, 1307, 1619, 1697, 1931, 2087, 2243, 2399, 2477, 2633, 2711, 2789, 3023, 3257, 3413, 3491, 3803, 3881, 4271, 4349, 4583, 4817, 4973, 5051, 5441, 5519, 5987, 6143, 6221, 6299, 6689, 7001, 7079, 7547, 7703, 7937 (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) ~ 24n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[3000]], MemberQ[{20}, Mod[#, 39]]&] (* Vincenzo Librandi, Aug 20 2012 *)

Select[Range[20, 8000, 39], PrimeQ] (* Harvey P. Dale, Jun 22 2013 *)

PROG

(Magma)[p: p in PrimesUpTo(9000) | p mod 39 eq 20 ]; // Vincenzo Librandi, Aug 20 2012

(PARI) is(n)=isprime(n) && n%39==20 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A107157 A039537 A220463 * A129480 A044310 A044691

Adjacent sequences: A142168 A142169 A142170 * A142172 A142173 A142174

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified November 29 09:34 EST 2022. Contains 358423 sequences. (Running on oeis4.)