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A260875 as a simple table

na(n)
11
21
3-1
41
5-1
60
71
8-1
90
10-1
111
12-1
132
141
151
161
17-1
189
19-1
201
21-1
221
23-1
2434
25-197
26-43
27-2
281
291
30-1
31125
32-5281
336841
34254
35-9
36-1
371
38-1
39461
40-123124
412185429
42-254801
434157
44-9
452
461
47-1
481715
49-2840293
50465693001
51-1854147586
52-3000807
53-70981
5450
55-2

[1,1,-1,1,-1,0,1,-1,0,-1,1,-1,2,1,1,1,-1,9,-1,1,
 -1,1,-1,34,-197,-43,-2,1,1,-1,125,-5281,6841,254,
 -9,-1,1,-1,461,-123124,2185429,-254801,4157,-9,2,
 1,-1,1715,-2840293,465693001,-1854147586,-3000807,
 -70981,50,-2]