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A089984 as a simple table

na(n)
11
21
31
41
50
61
7-1
81
9-1
100
111
121
13-1
141
15-2
16-1
173
185
19-1
20-2
217
22-3
23-13
2497
25200
262309
27-226573
2845538573
29-105193879657
30-23833987746960404
311085365814730154781188953
32114173840897460294190477827374165629

[1,1,1,1,0,1,-1,1,-1,0,1,1,-1,1,-2,-1,3,5,-1,-2,7,
 -3,-13,97,200,2309,-226573,45538573,-105193879657,
 -23833987746960404,1085365814730154781188953,
 114173840897460294190477827374165629]