A201481 Primes of the form 5*k^2 + 2, k >= 0.

2, 7, 47, 127, 607, 1447, 2207, 2647, 7607, 11047, 12007, 13007, 22447, 26647, 37847, 39607, 45127, 53047, 55127, 59407, 68447, 83207, 91127, 129607, 160207, 186247, 206047, 210127, 235447, 239807, 295247, 305047, 330247, 361807

Offset

1,1

Links

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

Mathematica

Select[Table[5n^2+2, {n, 0, 900}], PrimeQ]

Prog

(Magma) [a: n in [0..400] | IsPrime(a) where a is 5*n^2+2];

Crossrefs

Sequence in context: A027458 A062632 A116892 * A054555 A072287 A290488

Adjacent sequences: A201478 A201479 A201480 * A201482 A201483 A201484

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 02 2011

Status

approved