Create a function that takes a number n and returns the sum of all square numbers up to and including n.
squares_sum(3) ➞ 14
# 1² + 2² + 3² =
# 1 + 4 + 9 =
# 14
squares_sum(3) ➞ 14
squares_sum(12) ➞ 650
squares_sum(13) ➞ 819
Remember that n is included in the total.