# A363983 (b-file synthesized from sequence entry)
0 1
1 2
2 14
3 128
4 1310
5 14252
6 161168
7 1872096
8 22179102
9 266766500
10 3247293764
11 39914850560
12 494587904720
13 6170138404640
14 77420709800000
15 976308769560128
16 12365391374849310
17 157214288994620820
18 2005631418267291740