# A152337 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 24
5 120
6 640
7 3924
8 25536
9 205708
10 1739900
11 16259796
12 161820114
13 1804403590
14 21159038910
15 264205593296
16 3464634505962