A027758 Primes of the form k^2 + k + 9.

11, 29, 191, 281, 389, 659, 821, 1901, 2459, 3089, 5861, 6329, 7841, 11351, 14051, 14771, 19469, 21179, 22961, 23879, 30809, 36299, 42239, 43481, 44741, 55469, 56891, 64271, 67349, 72101, 73721, 90911, 96419, 137279, 139511

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

P. De Geest, World!Of Numbers

Mathematica

Select[Table[k^2+k+9, {k, 400}], PrimeQ] (* Harvey P. Dale, Sep 01 2025 *)

Prog

(Magma) [ a: k in [0..450] | IsPrime(a) where a is k^2+k+9 ]; // Vincenzo Librandi, Dec 29 2010

Crossrefs

Sequence in context: A302091 A122095 A282137 * A351353 A285992 A377587

Adjacent sequences: A027755 A027756 A027757 * A027759 A027760 A027761

Keyword

nonn

Author

Patrick De Geest

Status

approved