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A123202 as a simple table

na(n)
01
11
2-2
32
4-8
57
66
7-36
863
9-34
1024
11-192
12504
13-544
14209
15120
16-1200
174200
18-6800
195225
20-1546
21720
22-8640
2337800
24-81600
2594050
26-55656
2713327
285040
29-70560
30370440
31-999600
321536150
33-1363572
34653023
35-130922
3640320
37-645120
383951360
39-12794880

[1,1,-2,2,-8,7,6,-36,63,-34,24,-192,504,-544,209,
 120,-1200,4200,-6800,5225,-1546,720,-8640,37800,
 -81600,94050,-55656,13327,5040,-70560,370440,
 -999600,1536150,-1363572,653023,-130922,40320,
 -645120,3951360,-12794880]