A165697 a(n) is the smallest prime p such that all the n numbers reversal(p^k), k

2, 37, 3121, 10429, 10282339, 9835884797, 101740496633

Offset: 1

Author

Farideh Firoozbakht, Sep 29 2009

Keywords

• base
• hard
• more
• nonn

Comments

By an interesting approach I was able to find a(7). [From Farideh Firoozbakht, Sep 30 2009]

Examples

			Both numbers reversal(37)=73 & reversal(37^2)=9631 are primes and 37 is the
smallest prime number with this property so a(2)=37.
		

Crossrefs

Cf. A118212, A118213, A165696, A165698.

Extensions

a(7) from Farideh Firoozbakht, Sep 30 2009