n 1 2 3 4 5 6 7 8
7, 12, 40, 222, 1742 (1744), 17390, 208608, 2920414
2, 4, 6, 8, 10, 10, 12, 14 (multiply by 2n)
14, 48, 240, 1776, 17420 (17440), 208680, 2920512
-2, -8, -18, -32, -30, -50, -72, -98 (subtract 2n2)
Red shows incorrect term and green shows the correct term.