def diff_between_sum_of_squares_and_square_sum(n):
    a = sum([x for x in range(1, n + 1)])**2
    b = sum([x**2 for x in range(1, n + 1)])
    return a - b


def euler_006():
    return diff_between_sum_of_squares_and_square_sum(100)


assert(diff_between_sum_of_squares_and_square_sum(10) == 2640)
assert(euler_006() == 25164150)
print("e006.py: {}".format(euler_006()))