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A107416 as a simple table

na(n)
01
11
2-1
32
4-3
51
66
7-11
86
9-1
1030
11-61
1241
13-11
141
15240
16-518
17389
18-129
1919
20-1
213120
22-6974
235575
24-2066
25376
26-32
271
2865520
29-149574
30124049
31-48961
329962
33-1048
3453
35-1
362227680
37-5151036
384367240
39-1788723
40387669
41-45594
422850
43-87
441

[1,1,-1,2,-3,1,6,-11,6,-1,30,-61,41,-11,1,240,
 -518,389,-129,19,-1,3120,-6974,5575,-2066,376,-32,
 1,65520,-149574,124049,-48961,9962,-1048,53,-1,
 2227680,-5151036,4367240,-1788723,387669,-45594,
 2850,-87,1]