# A052604 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 30
4 240
5 2520
6 32400
7 478800
8 8104320
9 154586880
10 3273177600
11 76241088000
12 1937561472000
13 53340660172800
14 1581414202368000
15 50234310846720000
16 1702089880178688000
17 61276407362666496000