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A217356
Numbers n such that 8^n - 5 is prime.
2
1, 2, 4, 6, 12, 22, 50, 270, 606, 800, 1704, 5462, 6194, 9206, 10306, 105380
OFFSET
1,2
COMMENTS
All terms are equal to 1/3 of the multiples of 3 in A059608.
MATHEMATICA
Select[Range[4000], PrimeQ[8^# - 5] &]
PROG
(PARI) is(n)=ispseudoprime(8^n-5) \\ Charles R Greathouse IV, Jun 06 2017
CROSSREFS
Sequence in context: A326114 A135231 A326489 * A030793 A085988 A073349
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Oct 02 2012
STATUS
approved