# A075907 (b-file synthesized from sequence entry)
0 1
1 40
2 1040
3 22400
4 435456
5 7956480
6 139694080
7 2387968000
8 40075329536
9 663887544320
10 10896534405120
11 177653730508800
12 2882307270639616
13 46596186764738560
14 751299029274460160
15 12089975328525516800