A201474 Primes of the form 2n^2 + 5.

5, 7, 13, 23, 37, 103, 167, 293, 397, 653, 727, 887, 1063, 2053, 3533, 3877, 4423, 5413, 5623, 6277, 6733, 6967, 10663, 10957, 11863, 12487, 13127, 14797, 15493, 16567, 19213, 20407, 23333, 23767, 25997, 29287, 30757, 33287, 34327

Offset

1,1

Links

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

Mathematica

Select[Table[2n^2+5, {n, 0, 700}], PrimeQ]

Prog

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

Crossrefs

Sequence in context: A038901 A260791 A155006 * A078724 A191022 A262958

Adjacent sequences: A201471 A201472 A201473 * A201475 A201476 A201477

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 02 2011

Status

approved