# A309811 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 12
5 60
6 120
7 360
8 2520
9 5040
10 55440
11 720720
12 2162160
13 4324320
14 73513440
15 367567200
16 6983776800
17 160626866400
18 321253732800
19 9316358251200
20 288807105787200
21 2021649740510400
22 74801040398884800
23 224403121196654400
24 9200527969062830400
25 395622702669701707200