Adding the sum of the deviations alone without squaring them results in a number equal to or close to zero since the negative deviations will almost perfectly offset the positive deviations.

It's the sum of the cubes of numbers from 1 to 9: 1 3 +2 3 +3 3 +4 3 +5 3 +6 3 +7 3 +8 3 +9 3 =2025 5. The sum of the first 45 odd numbers is 2025: 1 + 3 + 5 + ··· + 89. 6. Harshad Number ...