Problem 15
19 April 2002
Starting in the top left corner of a 2
2 grid, there are 6 routes (without backtracking) to the bottom right corner.
How many routes are there through a 2020 grid?
Starting in the top left corner of a 22 grid, there are 6 routes (without backtracking) to the bottom right corner.
How many routes are there through a 2020 grid?