# A026739 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 8
4 72
5 384
6 3840
7 80640
8 645120
9 10321920
10 309657600
11 3715891200
12 102187008000
13 3310859059200
14 51011754393600
15 1428329123020800
16 68559797904998400
17 1942527607308288000