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Primes congruent to 45 mod 49.
1

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

%S 241,829,1123,1319,1613,1907,2593,2789,2887,3083,3181,3671,3769,4259,

%T 4357,4651,5827,6121,6317,6709,7297,7591,8081,8179,8669,8963,9257,

%U 9551,9649,10139,10433,10531,11119,11903,12197,12491,12589,13177,14549,14843,15137

%N Primes congruent to 45 mod 49.

%H Vincenzo Librandi, <a href="/A142452/b142452.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 42n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[2500]], MemberQ[{45}, Mod[#, 49]] &] (* _Vincenzo Librandi_, Aug 28 2012 *)

%o (Magma) [p: p in PrimesUpTo(17000) | p mod 49 eq 45]; // _Vincenzo Librandi_, Aug 28 2012

%o (PARI) is(n)=isprime(n) && n%49==45 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

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