2018
Problem - 4494
How many ways are there for Nick to travel from $(0,\ 0)$ to $(16,\ 16)$ in the coordinate plane by moving
one unit in the positive $x$ or $y$ direction at a time, such that Nick changes direction an odd number of
times?
How many ways are there for Nick to travel from $(0,\ 0)$ to $(16,\ 16)$ in the coordinate plane by moving
one unit in the positive $x$ or $y$ direction at a time, such that Nick changes direction an odd number of
times?