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A182928 as a simple table

na(n)
11
21
3-1
41
52
61
7-3
8-6
91
1024
111
12-10
1330
14-120
151
16720
171
18-35
19-630
20-5040
211
22560
2340320
241
25-126
2622680
27-362880
281
293628800
301
31-462
3211550
33-92400
34-1247400
35-39916800
361
37479001600
381
39-1716
4097297200
41-6227020800

[1,1,-1,1,2,1,-3,-6,1,24,1,-10,30,-120,1,720,1,
 -35,-630,-5040,1,560,40320,1,-126,22680,-362880,1,
 3628800,1,-462,11550,-92400,-1247400,-39916800,1,
 479001600,1,-1716,97297200,-6227020800]