Fixed Points of the Josephus Function via Fractional Base Expansions

In this paper, we investigated some interesting properties of the fixed points of the Josephus function $J_3$. First, we establish a connection between this sequence and the Chinese Remainder Theorem. Next, we observed a clear numerical pattern in the fixed points sequence when the terms are written in base $3/2$ using modular arithmetic, which allows us to develop a recursive procedure to determine the digits of their base $3/2$ expansions.