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A176918 as a simple table

na(n)
11
2-1
30
4-1
50
60
7-1
81
90
100
11-1
120
130
140
150
16-1
171
181
190
200
210
22-1
230
240
250
260
270
280
29-1
301
310
320
330
340
350
360
37-1
380
391
400
410
420
430
440
450
46-1
471
480
490
501
510
520
530
540
550
56-1
570
580
590
600
610
620
630
640
650
660
67-1
681
691
700
710
72-1
730
740

[1,-1,0,-1,0,0,-1,1,0,0,-1,0,0,0,0,-1,1,1,0,0,0,
 -1,0,0,0,0,0,0,-1,1,0,0,0,0,0,0,-1,0,1,0,0,0,0,0,
 0,-1,1,0,0,1,0,0,0,0,0,-1,0,0,0,0,0,0,0,0,0,0,-1,
 1,1,0,0,-1,0,0]