A045436 - OEIS

%I #10 Sep 08 2022 08:44:56

%S 3,17,29,31,43,59,71,73,101,113,127,157,197,199,211,227,239,241,269,

%T 281,283,311,337,353,367,379,409,421,449,463,479,491,521,547,563,577,

%U 617,619,631,647,659,661,673,701

%N Primes congruent to {1, 3} mod 7.

%H Vincenzo Librandi, <a href="/A045436/b045436.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[200]],MemberQ[{1,3},Mod[#,7]]&] (* _Vincenzo Librandi_, Aug 13 2012 *)

%o (Magma) [ p: p in PrimesUpTo(1000) | p mod 7 in {1,3} ]; // _Vincenzo Librandi_, Aug 13 2012

%Y Cf. A000040.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_