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%I #11 Sep 08 2022 08:45:35
%S 13,41,97,181,293,349,433,461,601,769,797,853,881,937,1021,1049,1217,
%T 1301,1553,1609,1637,1693,1721,1777,1861,1889,1973,2029,2113,2141,
%U 2281,2309,2393,2477,2617,2729,2897,2953,3037,3121,3373,3457,3541,3709,3793,3821
%N Primes congruent to 13 mod 28.
%H Vincenzo Librandi, <a href="/A141970/b141970.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) ~ 12n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t Select[Prime[Range[1500]],MemberQ[{13},Mod[#,28]]&] (* _Vincenzo Librandi_, Aug 17 2012 *)
%t Select[Range[13,4000,28],PrimeQ] (* _Harvey P. Dale_, May 08 2015 *)
%o (Magma) [p: p in PrimesUpTo(5000) | p mod 28 eq 13 ]; // _Vincenzo Librandi_, Aug 17 2012
%o (PARI) is(n)=isprime(n) && n%28==13 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y Cf. A000040.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008
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