A239346 Numbers n such that n^9+9 is prime.

2, 4, 10, 20, 40, 98, 100, 118, 122, 134, 140, 164, 190, 262, 272, 362, 400, 410, 494, 592, 602, 632, 638, 664, 830, 860, 862, 880, 938, 944, 962, 1120, 1148, 1162, 1202, 1288, 1340, 1360, 1408, 1498, 1594, 1642, 1772, 1802, 1840, 1870, 1874, 1882, 1960, 2078, 2092, 2158, 2170, 2188, 2348, 2368, 2462, 2474, 2482, 2488, 2498

Offset: 1

Author

Derek Orr, Mar 16 2014

Keywords

• easy
• nonn

Comments

Note that all numbers in this sequence are even.

Examples

			2^9+9 = 521 is prime. Thus, 2 is a member of this sequence.
		

Crossrefs

Cf. A067201, A049441.

Programs

PARI

is(n)=isprime(n^9+9) \\ Charles R Greathouse IV, Jun 06 2017

Python

import sympy
from sympy import isprime
{print(n) for n in range(10**4) if isprime(n**9+9)}