# A085466 (b-file synthesized from sequence entry)
1 2
2 8
3 32
4 384
5 1536
6 10240
7 368640
8 10321920
9 4587520
10 297271296
11 29727129600
12 435997900800
13 15695924428800
14 116598295756800
15 1523551064555520
16 1371195958099968000
17 5484783832399872000
18 41440588955910144000