A142448 Primes congruent to 40 mod 49.

89, 383, 677, 971, 1069, 1559, 1657, 1951, 2441, 2539, 2833, 3323, 3617, 3911, 4597, 4793, 5087, 5381, 5479, 6067, 6263, 6361, 6949, 7243, 7537, 8419, 8713, 9007, 9203, 9497, 9791, 10477, 10771, 11261, 12143, 12241, 12437, 12829, 13417, 13613, 13711

Offset

1,1

Links

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

Formula

a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[2500]], MemberQ[{40}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)
Select[Range[40, 14000, 49], PrimeQ] (* Harvey P. Dale, Dec 17 2022 *)

Prog

(Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 40]; // Vincenzo Librandi, Aug 28 2012
(PARI) is(n)=isprime(n) && n%49==40 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A022464 A143828 A253140 * A257118 A244777 A107192

Adjacent sequences: A142445 A142446 A142447 * A142449 A142450 A142451

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved