# A268222 (b-file synthesized from sequence entry) 5 5 6 15 7 30 8 35 9 105 10 210 11 70 12 280 13 840 14 1680 15 126 16 630 17 2520 18 7560 19 210 20 1260 21 6300 22 25200 23 75600 24 151200 25 330 26 2310 27 13860 28 69300 29 277200 30 831600 31 1663200 32 495 33 3960 34 27720 35 166320 36 831600 37 3326400 38 9979200 39 19958400