# A202360 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 16
4 144
5 768
6 10560
7 92160
8 1585920
9 21127680
10 419973120
11 7431782400
12 177081569280
13 3923981107200
14 105929096232960
15 2868863206809600
16 87449689674547200
17 2742391916199936000
18 94359281224797388800
19 3356687705428721664000