# A327022 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 6 4 1 5 30 6 90 7 1 8 56 9 70 10 1260 11 2520 12 1 13 90 14 420 15 3780 16 9450 17 75600 18 113400 19 1 20 132 21 990 22 924 23 8910 24 83160 25 34650 26 332640 27 1247400 28 6237000 29 7484400 30 1 31 182 32 2002 33 6006 34 18018 35 270270 36 252252 37 630630 38 1081080 39 15135120 40 12612600 41 37837800 42 189189000 43 681080400 44 681080400