A122062 Numbers n such that n^2 + 16 is prime.

1, 5, 9, 11, 15, 21, 25, 29, 31, 41, 49, 51, 55, 65, 75, 79, 81, 89, 91, 95, 99, 109, 115, 119, 121, 125, 129, 151, 165, 179, 191, 211, 219, 221, 229, 231, 245, 249, 265, 275, 281, 289, 291, 295, 299, 301, 311, 315, 335, 351, 355, 361, 365, 369, 381, 389, 391

Offset

1,2

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..5000

Example

If n=99 then n^2 + 16 = 9817 (prime).

Mathematica

Select[Range[1, 501, 2], PrimeQ[16+#^2]&] (* Harvey P. Dale, Dec 04 2018 *)

Prog

(Magma) [n: n in [0..6000] | IsPrime(n^2 + 16)] - Vincenzo Librandi, Nov 13 2010
(PARI) is(n)=isprime(n^2+16) \\ Charles R Greathouse IV, Jun 06 2017

Crossrefs

Cf. A005574, A067201, A049422, A007591, A078402, A114269, A114271, A114272, A114273, A114274, A114275, A113536, A121250, A121982.

Sequence in context: A314590 A314591 A314592 * A314593 A137011 A171629

Adjacent sequences: A122059 A122060 A122061 * A122063 A122064 A122065

Keyword

nonn

Author

Parthasarathy Nambi, Sep 14 2006

Status

approved