A239344 Numbers n such that n^7+7 is prime.

0, 16, 48, 66, 76, 94, 114, 120, 214, 216, 270, 346, 454, 496, 516, 594, 598, 606, 628, 730, 780, 786, 808, 936, 948, 1030, 1044, 1104, 1168, 1248, 1258, 1270, 1276, 1396, 1474, 1506, 1548, 1594, 1728, 1746, 1830, 1870, 1900, 1908, 1914, 1936, 1968, 2040, 2070, 2104, 2118, 2136, 2158, 2278, 2320, 2376, 2518, 2586, 2610, 2736

Offset: 1

Author

Derek Orr, Mar 16 2014

Keywords

• easy
• nonn

Comments

Note that all numbers in this sequence are even.

Examples

			16^7+7 = 268435463 is prime. Thus, 16 is a member of this sequence.
		

Crossrefs

Cf. A067201, A049441.

Programs

PARI

is(n)=isprime(n^7+7) \\ Charles R Greathouse IV, Jun 13 2017

Python

import sympy
from sympy import isprime
{print(n) for n in range(10**4) if isprime(n**7+7)}