1, 1, 2, 1, 4, 8, 1, 6, 24, 48, 1, 8, 48, 192, 384, 1, 10, 80, 480, 1920, 3840, 1, 12, 120, 960, 5760, 23040, 46080, 1, 14, 168, 1680, 13440, 80640, 322560, 645120, 1, 16, 224, 2688, 26880, 215040, 1290240, 5160960, 10321920, 1, 18, 288, 4032, 48384, 483840, 3870720, 23224320, 92897280, 185794560