A112405 - OEIS

A112405

Numbers k such that k^9 - 3 is prime.

2, 20, 22, 46, 74, 76, 104, 110, 112, 140, 196, 206, 212, 322, 332, 386, 434, 440, 572, 602, 764, 766, 806, 812, 820, 986, 1070, 1076, 1160, 1334, 1396, 1402, 1432, 1460, 1574, 1630, 1636, 1660, 1760, 1802, 2026, 2036, 2066, 2080, 2132, 2134, 2192, 2200

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

EXAMPLE

If k=140 then k^9 - 3 = 20661046783999999997 (prime).

MATHEMATICA

Select[ Range[2, 2233], PrimeQ[ #^9 - 3] &] (* Robert G. Wilson v, Jan 26 2006 *)

PROG

(PARI) is(n)=isprime(n^9-3) \\ Charles R Greathouse IV, Jun 06 2017

CROSSREFS