how many ways are there to move n times following the arrows
Source: KJMO 2014 p3
May 2, 2019
combinatorics
Problem Statement
Find the number of -movement on the following graph, starting from .
https://cdn.artofproblemsolving.com/attachments/2/0/4a23c83c7f5405575acbe6d09f202d87341337.png