Complete the series 2, 18, 84, 260, 630, ?
1^4 + 1 = 2 2^4 + 2 = 18 3^4 + 3 = 84 4^4 + 4 = 260 5^4 + 5 = 630 6^4 + 6 = 1302.
Complete the series 0, 2, 24, 252, 3120, ?