A142506 - OEIS

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

%S 151,457,661,967,1069,1171,1579,1783,1987,2089,2293,2803,3109,3313,

%T 3517,3823,4027,4129,4231,4639,5557,5659,6067,6271,6373,6577,6679,

%U 6781,6883,7393,7699,8209,8311,8719,8821,8923,9127,9433,9739,10453,10657,10861,11677

%N Primes congruent to 49 mod 51.

%H Vincenzo Librandi, <a href="/A142506/b142506.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 32n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[2000]], MemberQ[{49}, Mod[#, 51]] &] (* _Vincenzo Librandi_, Aug 29 2012 *)

%o (Magma) [p: p in PrimesUpTo(13000) | p mod 51 eq 49]; // _Vincenzo Librandi_, Aug 29 2012

%o (PARI) is(n)=isprime(n) && n%51==49 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

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