# A165658 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 4
5 6
6 48
7 64
8 96
9 576
10 1728
11 13824
12 165888
13 1036800
14 9953280
15 119439360
16 297271296
17 134369280000
18 222953472000
19 75246796800
20 32105299968000
21 229323571200
22 568865783808000000
23 125150472437760000
24 6129819058176000