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A318144 as a simple table

na(n)
01
10
2-1
30
4-1
52
60
7-1
82
9-6
100
11-1
124
13-6
1424
150
16-1
174
18-12
1924
20-120
210
22-1
236
24-18
2548
26-120
27720
280
29-1
306
31-24
3272
33-240
34720
35-5040
360
37-1
388
39-30
40120
41-360
421440
43-5040
4440320
450
46-1
478
48-42
49144
50-600
512160
52-10080
5340320
54-362880

[1,0,-1,0,-1,2,0,-1,2,-6,0,-1,4,-6,24,0,-1,4,-12,
 24,-120,0,-1,6,-18,48,-120,720,0,-1,6,-24,72,-240,
 720,-5040,0,-1,8,-30,120,-360,1440,-5040,40320,0,
 -1,8,-42,144,-600,2160,-10080,40320,-362880]