login
A142426
Primes congruent to 15 mod 49.
1
113, 211, 701, 1093, 1289, 1583, 1877, 2269, 2857, 3347, 3739, 4229, 4327, 4523, 4621, 4817, 5209, 5503, 6091, 6287, 6581, 6679, 7561, 7757, 8443, 8737, 8933, 9227, 9521, 9619, 10501, 11383, 11579, 11677, 11971, 12853, 13049, 13147, 13441, 13931, 14029
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Prime[Range[2500]], MemberQ[{15}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[15, 15000, 49], PrimeQ] (* Harvey P. Dale, Jul 29 2024 *)
PROG
(Magma) [p: p in PrimesUpTo(16000) | p mod 49 eq 15]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==15 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
Cf. A000040.
Sequence in context: A142276 A054695 A054696 * A309617 A210512 A319936
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved