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

0, 10, 28, 289, 2488888888888888999999999

Offset

0,2

Comments

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

Links

Table of n, a(n) for n=0..4.

Example

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.

Sequence in context: A345725 A185985 A358986 * A345696 A066527 A343385

Adjacent sequences: A239474 A239475 A239476 * A239478 A239479 A239480

Keyword

nonn,base

Author

Giovanni Resta, Mar 20 2014

Status

approved