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A098087 as a simple table

na(n)
01
11
25
31
41
5-1
6-1
71
81
9-1
10-1
111
12691
13-691
14-1
152
163617
17-3617
18-43867
1943867
20174611
21-174611
22-77683
23155366
24236364091
25-236364091
26-657931
271315862
283392780147
29-6785560294
30-3446336510402
316892673020804
327709321041217
33-7709321041217
34-151628697551
35151628697551

[1,1,5,1,1,-1,-1,1,1,-1,-1,1,691,-691,-1,2,3617,
 -3617,-43867,43867,174611,-174611,-77683,155366,
 236364091,-236364091,-657931,1315862,3392780147,
 -6785560294,-3446336510402,6892673020804,
 7709321041217,-7709321041217,-151628697551,
 151628697551]