# A097424 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 48
5 576
6 2304
7 15360
8 614400
9 1548288000
10 3901685760000
11 9832248115200000
12 24777265250304000000
13 62438708430766080000000
14 157345545245530521600000000
15 5154640062243579887616000000000