# A180112 (b-file synthesized from sequence entry)
2 1
3 3
4 11
5 57
6 360
7 2428
8 19692
9 178096
10 1814400
11 19748160
12 237351468
13 3091307829
14 43589145600
15 650470873262
16 10415387654044
17 177171175431551
18 3201186852864000
19 60647963017860105
20 1213361365706836584
21 25488014447816087399
22 562000363888803840000