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A265013
Numbers n such that n*9^n + 1 is prime.
1
2, 12382, 27608, 31330, 117852
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)];
KEYWORD
nonn,more,hard
AUTHOR
STATUS
approved