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A201860
Primes of the form 9n^2 - 2.
1
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
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
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 06 2011
STATUS
approved