# Almost Automorphic Number

**Number Theory**Level 5

\[\Large 249^3 = 15438\underline{249}\]

An *automorphic number* is defined as a positive integer \(n\) such that the trailing digits of \(n^m\), where \(m\) is a positive integer, is \(n\) itself.

Let us define an *almost automorphic number* as a number where \(n\) only appears as the trailing digits of \(n^m\) when \(m\) is odd. How many almost automorphic numbers are less than 1000?