# A214624 (b-file synthesized from sequence entry)
0 1
1 1
2 16
3 504
4 28800
5 2620800
6 348364800
7 63707212800
8 15343379251200
9 4707627724800000
10 1792664637603840000
11 829619584788234240000
12 458592296933263933440000
13 298435681233688170332160000
14 225843218230899155927040000000
15 196652982274555440023470080000000