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A201960
Primes of the form 9n^2 - 5.
1
31, 139, 571, 1291, 1759, 5179, 6079, 10399, 17419, 20731, 28219, 30271, 34591, 39199, 41611, 49279, 54751, 63499, 69691, 82939, 101119, 104971, 116959, 125311, 147451, 161599, 186619, 207931, 219019, 242059, 247999, 285151, 311359
OFFSET
1,1
LINKS
MATHEMATICA
Select[Table[9n^2-5, {n, 1, 800}], PrimeQ]
PROG
(Magma) [a: n in [1..400] | IsPrime(a) where a is 9*n^2-5];
CROSSREFS
Sequence in context: A142561 A165568 A141950 * A182916 A233303 A185521
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 07 2011
STATUS
approved