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A306861 as a simple table

na(n)
1-1
21
31
43
5-1
63
71
821
91
101
112
12-1
133
142
151
161
1742
1814
193
2073
213
222
231
244
253
26-1
272
281
293
301
313
321
333
343
351
366
372
383
39192
401
414
423
433
448
451
469
4736
485
4912
505
5118
521
5326
541
5516
5610
5715
582
5972
6022
613
624
632
644
655
661
6712
685
6913
703
719
721
736
7460
752
761
7758

[-1,1,1,3,-1,3,1,21,1,1,2,-1,3,2,1,1,42,14,3,73,3,
 2,1,4,3,-1,2,1,3,1,3,1,3,3,1,6,2,3,192,1,4,3,3,8,
 1,9,36,5,12,5,18,1,26,1,16,10,15,2,72,22,3,4,2,4,
 5,1,12,5,13,3,9,1,6,60,2,1,58]