OFFSET
1,1
COMMENTS
All terms are prime.
The corresponding primes: 51001, 95780952266636767336259095696501, ...
MATHEMATICA
Select[Range[1, 10000], PrimeQ[(11^# - 9^#)/2] &]
PROG
(PARI) for(n=1, 10000, if(isprime((11^n - 9^n)/2), print1(n, ", ")))
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Tim Johannes Ohrtmann, May 26 2016
STATUS
approved