On Wed, 28 Dec 2005, David Wilson wrote:
> For n >= 2, what is the smallest positive integer that has a different number of
> digits in each of the bases 2 through n?
>
Change "number of digits" to "number of distinct digits" and one gets for
n from 2 to 7: (if I'm not mistaken)
1, 2, 21, 156, 2343, 131071
---Edwin