Need explanation on a coding challenge

The challenge wants you to code a function, game, that takes one parameter N, and give the summed total value of an array NxN, where the value of each cell is defined by the function they have outlined in the description.

Challenge 1: What is the generalized form of the value of a cell? (If I am at Row 4, Column 12, what value goes in that cell, and why?)
Challenge 2: How do you add all of those fractions up?
Challenge 3: How do you simplify the resulting fraction at the end?