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A138076 as a simple table

na(n)
01
1-1
21
31
4-6
51
6-1
723
8-23
91
101
11-76
12230
13-76
141
15-1
16237
17-1682
181682
19-237
201
211
22-722
2310543
24-23548
2510543
26-722
271
28-1
292179
30-60657
31259723
32-259723
3360657
34-2179
351
361
37-6552
38331612
39-2485288
404675014
41-2485288
42331612
43-6552
441
45-1
4619673
47-1756340
4821707972
49-69413294
5069413294
51-21707972
521756340
53-19673
541

[1,-1,1,1,-6,1,-1,23,-23,1,1,-76,230,-76,1,-1,237,
 -1682,1682,-237,1,1,-722,10543,-23548,10543,-722,
 1,-1,2179,-60657,259723,-259723,60657,-2179,1,1,
 -6552,331612,-2485288,4675014,-2485288,331612,
 -6552,1,-1,19673,-1756340,21707972,-69413294,
 69413294,-21707972,1756340,-19673,1]