A142797 Primes congruent to 49 mod 60.

109, 229, 349, 409, 709, 769, 829, 1009, 1069, 1129, 1249, 1429, 1489, 1549, 1609, 1669, 1789, 2029, 2089, 2269, 2389, 2689, 2749, 3049, 3109, 3169, 3229, 3469, 3529, 3709, 3769, 3889, 4129, 4549, 4729, 4789, 4909, 4969, 5209, 5449, 5569, 5689, 5749, 5869

Offset: 1

Author

N. J. A. Sloane, Jul 11 2008

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A000040.

Programs

Magma

[p: p in PrimesUpTo(6000) | p mod 60 eq 49 ]; // Vincenzo Librandi, Sep 04 2012

Mathematica

Select[Prime[Range[900]], MemberQ[{49}, Mod[#, 60]] &] (* Vincenzo Librandi, Sep 04 2012 *)
Select[Range[49,6000,60],PrimeQ] (* Harvey P. Dale, Oct 02 2018 *)

PARI

is(n)=isprime(n) && n%60==49 \\ Charles R Greathouse IV, Jul 03 2016

Formula

a(n) ~ 16n log n. - Charles R Greathouse IV, Jul 03 2016