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A144474 as a simple table

na(n)
1-1
2-2
30
4-1
51
6-1
7-1
81
9-1
101
11-2
120
13-2
140
15-2
16-1
171
18-1
191
20-1
211
22-1
231
24-1
251
26-1
271
28-1
29-2
300
31-2
320
33-2
340
35-2
360
37-1
381
39-1
401
41-1
421
43-1
441
45-1
46-1
471
48-1
491
50-1
511
52-1
531
54-1
551

[-1,-2,0,-1,1,-1,-1,1,-1,1,-2,0,-2,0,-2,-1,1,-1,1,
 -1,1,-1,1,-1,1,-1,1,-1,-2,0,-2,0,-2,0,-2,0,-1,1,
 -1,1,-1,1,-1,1,-1,-1,1,-1,1,-1,1,-1,1,-1,1]