[seqfan] Shouldn't A158624 be hard and base?

[Alonso Del Arte]

A158624 is the upper limit of the "backward" value of 5^n. I'm thinking
this should have keyword:base because its value depends on base 10 (in
quintal it would of course just be 1/5), and keyword:hard because there is
no known formula.

Al

P.S. I have chosen this for Sequence of the Day for November
12<http://oeis.org/wiki/Template:Sequence_of_the_Day_for_November_12>
.