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A268038 as a simple table

na(n)
10
20
3-1
4-1
5-1
60
71
81
91
101
110
12-1
13-2
14-2
15-2
16-2
17-2
18-1
190
201
212
222
232
242
252
262
271
280
29-1
30-2
31-3
32-3
33-3
34-3
35-3
36-3
37-3
38-2
39-1
400
411
422
433
443
453
463
473
483
493
503
512
521
530
54-1
55-2
56-3
57-4
58-4
59-4
60-4
61-4
62-4
63-4
64-4
65-4
66-3
67-2
68-1
690
701
712
723
734
744
754

[0,0,-1,-1,-1,0,1,1,1,1,0,-1,-2,-2,-2,-2,-2,-1,0,
 1,2,2,2,2,2,2,1,0,-1,-2,-3,-3,-3,-3,-3,-3,-3,-2,
 -1,0,1,2,3,3,3,3,3,3,3,3,2,1,0,-1,-2,-3,-4,-4,-4,
 -4,-4,-4,-4,-4,-4,-3,-2,-1,0,1,2,3,4,4,4]