A142797 - OEIS

%I #11 Sep 08 2022 08:45:37

%S 109,229,349,409,709,769,829,1009,1069,1129,1249,1429,1489,1549,1609,

%T 1669,1789,2029,2089,2269,2389,2689,2749,3049,3109,3169,3229,3469,

%U 3529,3709,3769,3889,4129,4549,4729,4789,4909,4969,5209,5449,5569,5689,5749,5869

%N Primes congruent to 49 mod 60.

%H Vincenzo Librandi, <a href="/A142797/b142797.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 16n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[900]], MemberQ[{49}, Mod[#, 60]] &] (* _Vincenzo Librandi_, Sep 04 2012 *)

%t Select[Range[49,6000,60],PrimeQ] (* _Harvey P. Dale_, Oct 02 2018 *)

%o (Magma) [p: p in PrimesUpTo(6000) | p mod 60 eq 49 ]; // _Vincenzo Librandi_, Sep 04 2012

%o (PARI) is(n)=isprime(n) && n%60==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