# A083212 (b-file synthesized from sequence entry) 1 1 2 6 3 24 4 48 5 60 6 120 7 180 8 240 9 360 10 720 11 840 12 1260 13 1680 14 2520 15 5040 16 7560 17 10080 18 15120 19 20160