MathDB
Stepping numbers

Source: Centroamerican and Caribbean Math Olympiad 2023, P2

July 25, 2023
number theoryOMCCblackboardOperation

Problem Statement

Octavio writes an integer n1n \geq 1 on a blackboard and then he starts a process in which, at each step he erases the integer kk written on the blackboard and replaces it with one of the following numbers: 3k-1,   2k+1,   \frac{k}{2}. provided that the result is an integer.
Show that for any integer n1n \geq 1, Octavio can write on the blackboard the number 320233^{2023} after a finite number of steps.