# A052576 (b-file synthesized from sequence entry)
0 1
1 2
2 10
3 48
4 384
5 3840
6 46080
7 645120
8 10321920
9 185794560
10 3715891200
11 81749606400
12 1961990553600
13 51011754393600
14 1428329123020800
15 42849873690624000
16 1371195958099968000
17 46620662575398912000