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A106338 as a simple table

na(n)
01
11
2-1
31
4-3
52
61
7-9
814
9-6
101
11-45
12110
13-90
1424
151
16-585
171670
18-1710
19744
20-120
211
22-21105
2361670
24-66150
2532424
26-7560
27720
281
29-1858185
305439350
31-5864670
322925384
33-728280
3491440
35-5040
361
37-367958745
381077215510
39-1161894510
40580489224
41-145567800
4218961200
43-1285200
4440320
451

[1,1,-1,1,-3,2,1,-9,14,-6,1,-45,110,-90,24,1,-585,
 1670,-1710,744,-120,1,-21105,61670,-66150,32424,
 -7560,720,1,-1858185,5439350,-5864670,2925384,
 -728280,91440,-5040,1,-367958745,1077215510,
 -1161894510,580489224,-145567800,18961200,
 -1285200,40320,1]