# A240801 (b-file synthesized from sequence entry) 2 1 3 1 4 3 5 3 6 12 7 12 8 15 9 75 10 120 11 60 12 105 13 630 14 1350 15 1200 16 360 17 945 18 6615 19 17640 20 22050 21 12600 22 2520