yaworsw/euler-manager

---
:id: 15
:name: Lattice paths
:url: https://projecteuler.net/problem=15
:content: |+
  Starting in the top left corner of a 2×2 grid, and only being able to move to the right and down, there are exactly 6 routes to the bottom right corner.

   ![]({{ images_dir }}/p015.gif)

  How many such routes are there through a 20×20 grid?