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A141055 as a simple table

na(n)
0-1
1-2
2-60
3-120
4-5040
5-10080
6-302400
7-604800
8-39916800
9-79833600
10-217945728000
11-435891456000
12-2615348736000
13-5230697472000
14-2667655710720000
15-5335311421440000
16-4257578514309120000
17-8515157028618240000
18-2810001819444019200000

[-1,-2,-60,-120,-5040,-10080,-302400,-604800,
 -39916800,-79833600,-217945728000,-435891456000,
 -2615348736000,-5230697472000,-2667655710720000,
 -5335311421440000,-4257578514309120000,
 -8515157028618240000,-2810001819444019200000]