A239345 - OEIS

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A239345

Numbers n such that n^8+8 is prime.

3, 33, 105, 129, 165, 201, 231, 351, 363, 393, 447, 543, 687, 861, 951, 1107, 1149, 1227, 1257, 1269, 1293, 1359, 1389, 1515, 1557, 1605, 1647, 1689, 1761, 1803, 1815, 1941, 1977, 2073, 2127, 2145, 2163, 2289, 2355, 2415, 2445, 2481, 2571, 2607, 2619, 2775, 2811, 2859, 2973, 3141, 3171, 3321, 3327, 3333, 3393, 3471, 3501, 3513

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OFFSET

1,1

COMMENTS

Note that all the numbers in this sequence are odd.

LINKS

Table of n, a(n) for n=1..58.

EXAMPLE

3^8+8 = 6569 is prime. Thus, 3 is a member of this sequence.

MATHEMATICA

Select[Range[1, 3600, 2], PrimeQ[#^8+8]&] (* Harvey P. Dale, Apr 20 2015 *)

PROG

(Python)

import sympy

from sympy import isprime

{print(n) for n in range(10**4) if isprime(n**8+8)}

(PARI) is(n)=isprime(n^8+8) \\ Charles R Greathouse IV, Jun 06 2017

CROSSREFS

Cf. A067201, A049441.

Sequence in context: A123049 A153783 A048911 * A089015 A292453 A292733

Adjacent sequences: A239342 A239343 A239344 * A239346 A239347 A239348

KEYWORD

easy,nonn

AUTHOR

Derek Orr, Mar 16 2014

STATUS

approved