# A089503 (b-file synthesized from sequence entry) 1 1 2 1 3 4 4 1 5 12 6 30 7 1 8 24 9 168 10 336 11 1 12 40 13 540 14 2880 15 5040 16 1 17 60 18 1320 19 13200 20 59400 21 95040 22 1 23 84 24 2730 25 43680 26 360360 27 1441440 28 2162160 29 1 30 112 31 5040 32 117600 33 1528800 34 11007360 35 40360320 36 57657600 37 1 38 144 39 8568 40 274176 41 5140800 42 57576960