# A277183 (b-file synthesized from sequence entry)
1 1
2 2
3 12
4 48
5 540
6 5040
7 53760
8 745920
9 12897360
10 206236800
11 3682657440
12 83366236800
13 1849952744640
14 45496897205760
15 1176291493977600
16 32097739145472000
17 983522184476832000
18 31186123650255974400
19 1021800029809932172800
20 35859334900163943168000
21 1320567044275182140236800
22 50849016060752080883712000
23 2063131407115000462188748800
24 86946484539570696351914803200