# A092187 (b-file synthesized from sequence entry)
2 1
3 1
4 4
5 6
6 36
7 72
8 576
9 1440
10 14400
11 43200
12 518400
13 1814400
14 25401600
15 101606400
16 1625702400
17 7315660800
18 131681894400
19 658409472000
20 13168189440000
21 72425041920000
22 1593350922240000
23 9560105533440000
24 229442532802560000
25 1491376463216640000
26 38775788043632640000