A329537 a(n) is the minimum number whose product of digits contains n digits.

1, 25, 269, 2789, 27999, 289999, 2999999, 37999999, 379999999, 3899999999, 39999999999, 489999999999, 4899999999999, 49999999999999, 589999999999999, 5999999999999999, 69999999999999999, 699999999999999999, 7999999999999999999, 89999999999999999999, 999999999999999999999, 25999999999999999999999

Offset

1,2

Comments

A007954(a(n)) is the first entry in A007954 to contain n digits, ignoring A007954(0).

Links

Table of n, a(n) for n=1..22.

Example

a(2) = 25 as 2*5 = 10 which contains two digits, and no smaller value has a digit product with two digits.
a(4) = 2789 as 2*7*8*9 = 1008 which contains four digits, and no smaller value has a digit product with four digits.

Crossrefs

Cf. A007954.

Sequence in context: A298717 A058482 A114932 * A012859 A010830 A022717

Adjacent sequences: A329534 A329535 A329536 * A329538 A329539 A329540

Keyword

nonn,base

Author

Scott R. Shannon, Nov 16 2019

Status

approved