OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(9) > 10^5. - Robert Price, Jan 28 2015
MATHEMATICA
Select[Range[1000], PrimeQ[82^# - 81^#] &] (* Robert Price, Jan 28 2015 *)
PROG
(PARI) is(n)=ispseudoprime(82^n-81^n) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(8) from Robert Price, Jan 28 2015
STATUS
approved