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A274215 Numbers n such that 8^n + 7^(n+1) is prime. 0
4, 6, 46, 58, 184, 336, 29274, 98928 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(9) > 10^5.

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

Select[Range[0, 100000], PrimeQ[8^# + 7^(# + 1)] &]

PROG

(PARI) is(n)=ispseudoprime(8^n+7^(n+1)) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A093765.

Sequence in context: A012935 A013166 A174653 * A119944 A338814 A134592

Adjacent sequences:  A274212 A274213 A274214 * A274216 A274217 A274218

KEYWORD

nonn,more

AUTHOR

Robert Price, Jun 13 2016

STATUS

approved

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Last modified September 29 18:39 EDT 2022. Contains 357090 sequences. (Running on oeis4.)