A142507 - OEIS

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

%S 101,509,1019,1223,1427,1733,2039,2141,2243,2447,2549,2753,2957,3467,

%T 3671,4079,4283,4691,4793,5099,5303,5507,5711,5813,6221,6323,6833,

%U 7547,7649,7853,8363,8669,9281,9587,9689,9791,10301,10607,10709,11117,11321,11423

%N Primes congruent to 50 mod 51.

%H Vincenzo Librandi, <a href="/A142507/b142507.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[{50}, Mod[#, 51]] &] (* _Vincenzo Librandi_, Aug 29 2012 *)

%o (Magma) [p: p in PrimesUpTo(13000) | p mod 51 eq 50]; // _Vincenzo Librandi_, Aug 29 2012

%o (PARI) is(n)=isprime(n) && n%51==50 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

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