# A178848 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 24
5 120
6 480
7 3600
8 23040
9 221760
10 1895040
11 17942400
12 195229440
13 2726760960
14 29650279680
15 479288355840
16 6120338273280
17 99262251970560
18 1726003206789120