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, 14, 325, 3244, 3244, 110218462, 32149366346, 10212002596432

Offset: 1

Author

Farideh Firoozbakht, Sep 29 2009

Keywords

• nonn
• base
• hard
• more

Examples

			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

Cf. A004086, A118212, A118213, A165697, A165698, A165699.

Extensions

a(8) from Matthias Baur, Mar 03 2021