A201784 Primes of the form 5n^2 - 2.

3, 43, 1123, 2203, 3643, 5443, 7603, 13003, 19843, 28123, 32803, 49003, 61603, 68443, 83203, 117043, 146203, 167443, 178603, 214243, 226843, 239803, 280843, 356443, 406123, 423403, 441043, 496123, 595123, 616003, 637243, 680803

Offset

1,1

Links

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

Mathematica

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

Prog

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

Crossrefs

Sequence in context: A277496 A302218 A302664 * A364498 A340822 A355004

Adjacent sequences: A201781 A201782 A201783 * A201785 A201786 A201787

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 05 2011

Status

approved