A141920 - OEIS

%I #12 Sep 08 2022 08:45:35

%S 131,223,269,499,683,821,1051,1097,1327,1373,1511,1741,1787,1879,2017,

%T 2063,2293,2339,2477,2707,2753,3121,3167,3259,3581,3673,3719,4133,

%U 4271,4363,4409,4547,4639,5099,5237,5651,5743,5881,5927,6203,6571,6709,7307,7537

%N Primes congruent to 16 mod 23.

%H Vincenzo Librandi, <a href="/A141920/b141920.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 22n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Range[16,20000,23],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, May 18 2011 *)

%o (Magma) [p: p in PrimesUpTo(9000) | p mod 23 eq 16 ]; // _Vincenzo Librandi_, Aug 16 2012

%o (PARI) is(n)=isprime(n) && n%23==16 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040, A141921, A141922, A141923.

%K nonn,easy

%O 1,1

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