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A142433
Primes congruent to 23 mod 49.
3
23, 317, 709, 1297, 1493, 1787, 2081, 2179, 2473, 2767, 2963, 3061, 3257, 3943, 4139, 5021, 5119, 5413, 5903, 6197, 6491, 6883, 7079, 7177, 8059, 8353, 8647, 8941, 9137, 9431, 10313, 10607, 11489, 11587, 11783, 12763, 12959, 13841, 14723, 14821, 15017
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 02 2016
MATHEMATICA
Select[Prime[Range[2500]], MemberQ[{23}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[23, 16000, 49], PrimeQ] (* Harvey P. Dale, Sep 13 2018 *)
PROG
(Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 23]; // Vincenzo Librandi; Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==23 \\ Charles R Greathouse IV, Jul 02 2016
CROSSREFS
Cf. A000040.
Sequence in context: A090927 A045530 A080188 * A234234 A125458 A329164
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved