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A165696
a(n) is the smallest number m such that the n numbers A004086(m^k) (digit reversal of m^k) for 0 < k < n+1 are all primes.
2
2, 14, 325, 3244, 3244, 110218462, 32149366346, 10212002596432
OFFSET
1,1
EXAMPLE
Both numbers A004086(14) = 41 and A004086(14^2) = 691 are primes and 14 is the smallest number with this property so a(2) = 14.
CROSSREFS
KEYWORD
nonn,base,hard,more
AUTHOR
Farideh Firoozbakht, Sep 29 2009
EXTENSIONS
a(8) from Matthias Baur, Mar 03 2021
STATUS
approved