# A176785 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 4
4 24
5 256
6 3360
7 53824
8 1016064
9 22095616
10 543966720
11 14955833344
12 454227400704
13 15103031627776
14 545668238868480
15 21286707282264064
16 891735287528914944
17 39926103010743156736