title: Starting in the top left corner in a 20 by 20 grid, how many routes are there to the bottom right corner?
url: http://projecteuler.net/problem=15

desc: |
  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?
  
solution: |
  (2n)!/n!^2 - Where n is the size of the grid -
  
todo: Find a more "programmable way" instead of this cheating mathsolution

solutions:
  solve.php:
    desc: Using BCMath to cope with large numbers
    language: php
  solve.rb:
    desc: Basic solution
    language: ruby
