OFFSET
1,1
COMMENTS
All terms are prime.
a(12) > 10^5.
MATHEMATICA
Select[ Prime[ Range[1, 100000] ], PrimeQ[ (9^# + 8^#)/17 ]& ]
PROG
(PARI) is(n)=isprime((9^n+8^n)/17) \\ Charles R Greathouse IV, Feb 17 2017
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Robert Price, Dec 26 2012
STATUS
approved