# A073618 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 3 5 12 6 30 7 60 8 210 9 840 10 1260 11 2520 12 13860 13 27720 14 180180 15 360360 16 180180 17 720720 18 6126120 19 12252240 20 116396280 21 232792560 22 116396280 23 232792560 24 2677114440 25 5354228880 26 13385572200 27 26771144400 28 40156716600 29 80313433200 30 1164544781400 31 2329089562800