A239417 Numbers n such that n^9-9 is prime.

2, 62, 86, 88, 116, 152, 266, 292, 310, 326, 338, 356, 406, 436, 466, 470, 518, 550, 568, 616, 626, 650, 688, 700, 722, 812, 850, 926, 956, 992, 1058, 1076, 1126, 1186, 1252, 1430, 1550, 1570, 1642, 1672, 1682, 1766, 1808, 1852, 1868, 1888, 2138, 2210, 2306

Offset: 1

Author

Derek Orr, Mar 17 2014

Keywords

• nonn

Comments

Note that all numbers in this sequence are even.

Examples

			2^9-9 = 503 is prime. Thus, 2 is a member of this sequence.
		

Crossrefs

Cf. A028870, A153974, A239413, A239414, A239415, A239416, A239418, A239346.

Programs

PARI

is(n)=isprime(n^9-9) \\ Charles R Greathouse IV, Feb 20 2017

Python

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