A201960 Primes of the form 9n^2 - 5.

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

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

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

Adjacent sequences: A201957 A201958 A201959 * A201961 A201962 A201963

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 07 2011

Status

approved