A201481 - OEIS

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A201481

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

1

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

(list; graph; refs; listen; history; text; internal format)

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