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A123956 as a simple table

na(n)
0-1
11
21
3-1
4-2
5-2
61
7-3
84
94
10-1
114
128
13-8
14-8
151
165
17-12
18-20
1916
2016
21-1
22-6
23-18
2432
2548
26-32
27-32
281
29-7
3024
3156
32-80
33-112
3464
3564
36-1
378
3832
39-80
40-160
41192
42256
43-128
44-128
451
469
47-40
48-120
49240
50432
51-448
52-576
53256
54256
55-1
56-10
57-50
58160
59400
60-672
61-1120
621024
631280
64-512
65-512

[-1,1,1,-1,-2,-2,1,-3,4,4,-1,4,8,-8,-8,1,5,-12,
 -20,16,16,-1,-6,-18,32,48,-32,-32,1,-7,24,56,-80,
 -112,64,64,-1,8,32,-80,-160,192,256,-128,-128,1,9,
 -40,-120,240,432,-448,-576,256,256,-1,-10,-50,160,
 400,-672,-1120,1024,1280,-512,-512]