# A256605 (b-file synthesized from sequence entry) 2 3 3 4 4 20 5 12 6 84 7 120 8 360 9 360 10 3960 11 2520 12 32760 13 27720 14 27720 15 55440 16 942480 17 720720 18 13693680 19 12252240 20 12252240 21 12252240 22 281801520 23 232792560 24 1163962800 25 1163962800 26 3491888400 27 3491888400 28 101264763600 29 80313433200 30 2489716429200 31 4658179125600