# A052630 (b-file synthesized from sequence entry)
0 1
1 4
2 34
3 432
4 7320
5 155040
6 3940560
7 116847360
8 3959786880
9 150965337600
10 6394994323200
11 297985937356800
12 15147464243788800
13 834153946904678400
14 49469459519031552000
15 3143339899991875584000
16 213046423884047609856000