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A198382 Numbers n such that 90n + 37 is prime. 22

%I #27 Sep 08 2022 08:45:59

%S 0,1,3,4,5,6,8,10,12,14,17,18,19,22,25,26,27,28,29,32,35,38,39,40,41,

%T 43,46,48,49,55,56,57,59,60,61,67,69,70,71,73,77,78,80,82,83,85,87,92,

%U 96,101,104,116,117,118,120,124,125,127,131,133,134,136,138

%N Numbers n such that 90n + 37 is prime.

%H Ivan Neretin, <a href="/A198382/b198382.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = (A142331(n)-37)/90.

%t Select[Range[0, 150], PrimeQ[90 # + 37] &] (* _Vincenzo Librandi_, Apr 07 2015 *)

%o (PARI) isok(n) = isprime(90*n+37) \\ _Michel Marcus_, Jul 24 2013

%o (Magma) [n: n in [0..150] | IsPrime(90*n+37)]; // _Vincenzo Librandi_, Apr 07 2015

%Y Cf. A181732.

%K nonn,easy

%O 1,3

%A _J. W. Helkenberg_, Oct 24 2011

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Last modified April 23 09:22 EDT 2024. Contains 371905 sequences. (Running on oeis4.)