# A052580 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 12
4 120
5 1440
6 20880
7 352800
8 6814080
9 148055040
10 3574368000
11 94922150400
12 2749948185600
13 86306508288000
14 2917072801843200
15 105636550795776000
16 4080467097907200000
17 167469023145295872000