A142428 - OEIS

%I #9 Sep 08 2022 08:45:36

%S 17,311,409,997,1193,1291,1487,1879,2467,2663,2957,3251,3643,4133,

%T 4231,4721,5113,5309,5407,5701,5897,6779,7759,8053,8543,8641,8837,

%U 9719,9817,10111,10601,10993,11287,11483,11777,12071,12659,12757,12953,13933,14423

%N Primes congruent to 17 mod 49.

%H Vincenzo Librandi, <a href="/A142428/b142428.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 42n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[2500]], MemberQ[{17}, Mod[#,49]] &] (* _Vincenzo Librandi_, Aug 28 2012 *)

%o (Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 17]; // _Vincenzo Librandi_, Aug 28 2012

%o (PARI) is(n)=isprime(n) && n%49==17 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_, Jul 11 2008