1. The problem statement, all variables and given/known data Is there a general formula for the sum of such a series (or can it be self derived) ? 2^2 + 4^2 + 6^2 + 8^2 ..... N^2 (all the way till some even number N) 2. Relevant equations [itex]\sum r^2[/itex] (from r=1 to r=N) = 1/6 * n(n+1)(2n+1) 3. The attempt at a solution No clue where to start.