A201860 Primes of the form 9n^2 - 2.

7, 79, 223, 439, 727, 1087, 3967, 4759, 5623, 8647, 13687, 18223, 31327, 33487, 53359, 56167, 71287, 74527, 77839, 81223, 91807, 95479, 99223, 127447, 149767, 159199, 164023, 184039, 189223, 194479, 199807, 239119, 245023, 263167

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Mathematica

Select[Table[9n^2-2, {n, 1, 800}], PrimeQ]

Prog

(Magma) [a: n in [1..400] | IsPrime(a) where a is 9*n^2-2];

Crossrefs

Sequence in context: A139945 A023285 A135051 * A176130 A014232 A154592

Adjacent sequences: A201857 A201858 A201859 * A201861 A201862 A201863

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 06 2011

Status

approved