This document contains a grid of numbers from 20 to 0, with each line representing the number of squares of a certain size that can fit within a 20x20 grid. It then lists the number of 1x1, 2x2, 3x3, 4x4, and 5x5 squares that can be in the 20x20 grid, with the totals being 25, 16, 9, 4, and 1 squares respectively.