A201606 Primes of the form 7n^2 + 5.

5, 257, 1013, 2273, 30497, 36293, 90977, 183713, 197573, 326597, 383297, 423617, 533237, 707873, 734837, 790277, 1000193, 1097717, 1199777, 1270337, 1306373, 1379957, 1951493, 1996097, 2086817, 2371073, 2420213, 2570657, 3217793

Offset

1,1

Links

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

Mathematica

Select[Table[7n^2+5, {n, 0, 3000}], PrimeQ]

Prog

(Magma) [a: n in [0..800] | IsPrime(a) where a is 7*n^2+5];

Crossrefs

Sequence in context: A283039 A055386 A216849 * A139000 A061959 A002554

Adjacent sequences: A201603 A201604 A201605 * A201607 A201608 A201609

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 03 2011

Status

approved