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A231345 as a simple table

na(n)
1-1
2-1
3-1
41
5-1
60
7-1
83
9-1
100
111
12-1
135
140
15-1
160
170
18-1
197
203
21-1
220
230
241
25-1
269
270
280
29-1
300
315
320
33-1
3411
350
360
37-1
380
390
403
41-1
4213
437
440
451
46-1
470
480
490
500
51-1
5215
530
540
550
56-1
570
589
595
600
61-1
6217
630
640
650
66-1
670
680
690
703
71-1
7219
7311
740
750
761

[-1,-1,-1,1,-1,0,-1,3,-1,0,1,-1,5,0,-1,0,0,-1,7,3,
 -1,0,0,1,-1,9,0,0,-1,0,5,0,-1,11,0,0,-1,0,0,3,-1,
 13,7,0,1,-1,0,0,0,0,-1,15,0,0,0,-1,0,9,5,0,-1,17,
 0,0,0,-1,0,0,0,3,-1,19,11,0,0,1]