# A162440 (b-file synthesized from sequence entry)
2 2
3 16
4 144
5 4608
6 115200
7 4147200
8 203212800
9 26011238400
10 2106910310400
11 210691031040000
12 25493614755840000
13 3671080524840960000
14 620412608698122240000
15 121600871304831959040000