A239477 Smallest number with additive and multiplicative persistence equal to n.

0, 10, 28, 289, 2488888888888888999999999

Offset: 0

Author

Giovanni Resta, Mar 20 2014

Keywords

• nonn
• base

Comments

The corresponding smallest primes are 2, 11, 29, 487 and 2488888888888898999989999.

Examples

			a(3) = 289 because 289 is the smallest number with additive persistence 3, 289 -> 19 -> 10 -> 1 and multiplicative persistence 3, 289 -> 144 -> 16  -> 6.
		

Crossrefs

Cf. A031346, A003001, A031286, A006050, A239427.