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A158982 as a simple table

na(n)
11
2-2
31
4-4
52
61
7-8
820
9-16
102
111
12-16
13104
14-352
15660
16-672
17336
18-64
192
201
21-32
22464
23-4032
2423400
25-95680
26283360
27-615296
28980628
29-1136960
30940576
31-537472
32201552
33-45696
345440
35-256
362
371
38-64
391952
40-37760
41520144
42-5430656
4344662464

[1,-2,1,-4,2,1,-8,20,-16,2,1,-16,104,-352,660,
 -672,336,-64,2,1,-32,464,-4032,23400,-95680,
 283360,-615296,980628,-1136960,940576,-537472,
 201552,-45696,5440,-256,2,1,-64,1952,-37760,
 520144,-5430656,44662464]