A201785 Primes of the form 5n^2 - 3.

2, 17, 317, 977, 1277, 1997, 2417, 3917, 9677, 12497, 20477, 23117, 33617, 48017, 60497, 109517, 127997, 137777, 144497, 154877, 165617, 180497, 216317, 224717, 269117, 353777, 369917, 499277, 511997, 518417, 612497, 662477, 721997

Offset

1,1

Links

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

Mathematica

Select[Table[5n^2-3, {n, 1, 2000}], PrimeQ]

Prog

(Magma) [a: n in [1..400] | IsPrime(a) where a is 5*n^2-3];

Crossrefs

Sequence in context: A304857 A007785 A360609 * A368488 A204249 A242368

Adjacent sequences: A201782 A201783 A201784 * A201786 A201787 A201788

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 05 2011

Status

approved