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A172986 as a simple table

na(n)
00
11
2-1
31
40
50
61
70
81
90
101
111
121
131
142
151
162
173
182
194
203
213
225
234
244
255
264
275
284
295
305
315
325
336
345
356
367
376
388
397
408
416
428
437
447
458
467
478
487
498
508
518
528
539
548
559
5610
579
5811
5910
6011
619
6211
6310
6410
6511
6610
6711
6810
6911
7011
7111
7211
7312
7411
7512
7613
7712
7814
7913
8014
8112
8214
8313
8413
8514
8613
8714
8813

[0,1,-1,1,0,0,1,0,1,0,1,1,1,1,2,1,2,3,2,4,3,3,5,4,
 4,5,4,5,4,5,5,5,5,6,5,6,7,6,8,7,8,6,8,7,7,8,7,8,7,
 8,8,8,8,9,8,9,10,9,11,10,11,9,11,10,10,11,10,11,
 10,11,11,11,11,12,11,12,13,12,14,13,14,12,14,13,
 13,14,13,14,13]