Suppose you want to know how many
tautonymic numbers are in the set of integers from 1 to N.
 Can you provide a formula for this?
 Otherwise, can you devise an algorithm, as efficient as possible, to find the answer?
 Are there special values of N for which there is a simple formula?
This is a difficult problem that I have not been able to find the answer to. Based on your explanation has made me understand better.

Posted by Arjun
on 20230719 02:27:02 