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

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, 43, 46, 48, 49, 55, 56, 57, 59, 60, 61, 67, 69, 70, 71, 73, 77, 78, 80, 82, 83, 85, 87, 92, 96, 101, 104, 116, 117, 118, 120, 124, 125, 127, 131, 133, 134, 136, 138

Offset: 1

Author

J. W. Helkenberg, Oct 24 2011

Keywords

• nonn
• easy

Links

• Ivan Neretin, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A181732.

Programs

Magma

[n: n in [0..150] | IsPrime(90*n+37)]; // Vincenzo Librandi, Apr 07 2015

Mathematica

Select[Range[0, 150], PrimeQ[90 # + 37] &] (* Vincenzo Librandi, Apr 07 2015 *)

PARI

isok(n) = isprime(90*n+37) \\ Michel Marcus, Jul 24 2013

Formula

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