In fact powers of any integer don't have a Benford-style distribution of their last digits, since those digits will repeat periodicially. For example powers of

In fact powers of any integer don't have a Benford-style distribution of their last digits, since those digits will repeat periodicially. For example powers of 2 end in 2, 4, 8, 6, 2, 4, 8, 6, ...