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A115978 as a simple table

na(n)
01
1-2
20
3-2
46
50
60
7-4
80
9-2
100
110
126
13-4
140
150
166
170
180
19-4
200
21-4
220
230
240
25-2
260
27-2
2812
290
300
31-4
320
330
340
350
366
37-4
380
39-4
400
410
420
43-4
440
450
460
470
486
49-6
500
510
5212
530
540
550
560
57-4
580
590
600
61-4
620
63-4
646
650
660
67-4
680
690
700
710
720
73-4
740
75-2
7612
770
780
79-4
800
81-2
820
830
8412
850
860
870
880
890
900
91-8
920
93-4
940
950
960
97-4
980
990
1006
1010

[1,-2,0,-2,6,0,0,-4,0,-2,0,0,6,-4,0,0,6,0,0,-4,0,
 -4,0,0,0,-2,0,-2,12,0,0,-4,0,0,0,0,6,-4,0,-4,0,0,
 0,-4,0,0,0,0,6,-6,0,0,12,0,0,0,0,-4,0,0,0,-4,0,-4,
 6,0,0,-4,0,0,0,0,0,-4,0,-2,12,0,0,-4,0,-2,0,0,12,
 0,0,0,0,0,0,-8,0,-4,0,0,0,-4,0,0,6,0]