# A119500 (b-file synthesized from sequence entry) 1 1 2 6 3 12 4 24 5 30 6 60 7 120 8 180 9 240 10 360 11 420 12 720 13 840 14 1260 15 1680 16 2520 17 4620 18 5040 19 7560 20 9240