1, 2, 4, 8, 1, 3, 6, 1 ... is a non-cyclic series where a(n) represents the leading digit of 2^n.

a) How many ones are there within the first 3000 members?
b) Same question for a digit d, other than digit one.

(In reply to Old-fogey logic (spoiler) by Steve Herman)

Another notch for old-fogey logic, well done!

Posted by broll on 2011-02-19 02:43:29