# A162820 (b-file synthesized from sequence entry) 1 12 2 15 3 20 4 30 5 40 6 60 7 84 8 90 9 120 10 140 11 165 12 180 13 240 14 300 15 340 16 390 17 540 18 660 19 840 20 1140 21 1740 22 3540