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A307873 as a simple table

na(n)
1-1
21
3-1
410905
515
62
71
82
93
101
113
12173
131
1414
151
1643
171
185
1911
201
212
223
233
241
252
26-1
275
28421
293
301
31-1
321
331
343
35-1
3615
37-1
383
393
40163
41-1
423
4313
44-1
45679
46-1
475
485
49-1
50107
5193
521
53-1
543
55-1
561
57-1
589
595
60-1
61-1
629
631089
64-1
653
667
673
6815
69-1
7027
71-1
721
73-1
7427
7517
7625
771
7815
793

[-1,1,-1,10905,15,2,1,2,3,1,3,173,1,14,1,43,1,5,
 11,1,2,3,3,1,2,-1,5,421,3,1,-1,1,1,3,-1,15,-1,3,3,
 163,-1,3,13,-1,679,-1,5,5,-1,107,93,1,-1,3,-1,1,
 -1,9,5,-1,-1,9,1089,-1,3,7,3,15,-1,27,-1,1,-1,27,
 17,25,1,15,3]