A239417 - OEIS

%I #11 Feb 20 2017 14:47:20

%S 2,62,86,88,116,152,266,292,310,326,338,356,406,436,466,470,518,550,

%T 568,616,626,650,688,700,722,812,850,926,956,992,1058,1076,1126,1186,

%U 1252,1430,1550,1570,1642,1672,1682,1766,1808,1852,1868,1888,2138,2210,2306

%N Numbers n such that n^9-9 is prime.

%C Note that all numbers in this sequence are even.

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

%o (Python)

%o import sympy

%o from sympy import isprime

%o {print(n) for n in range(10**4) if isprime(n**9-9)}

%o (PARI) is(n)=isprime(n^9-9) \\ _Charles R Greathouse IV_, Feb 20 2017

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

%K nonn

%O 1,1

%A _Derek Orr_, Mar 17 2014