OFFSET
1,1
COMMENTS
All terms are even. - Robert Israel, Jan 18 2016
MATHEMATICA
Select[Range[100000], PrimeQ[# 9^# + 1] &]
PROG
(PARI) for(n=1, 100000, if(isprime(n*9^n+1), print1(n, ", ")))
(Magma) [n: n in [0..100000] | IsPrime(n*9^n+1)];
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Tim Johannes Ohrtmann, Nov 30 2015
STATUS
approved