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A117907 as a simple table

na(n)
01
1-1
21
30
40
50
61
7-2
81
90
100
110
121
13-2
141
150
160
170
181
19-2
201
210
220
230
241
25-2
261
270
280
290
301
31-2
321
330
340
350
361
37-2
381
390
400
410
421
43-2
441
450
460
470
481
49-2
501
510
520
530
541
55-2
561
570
580
590
601
61-2
621

[1,-1,1,0,0,0,1,-2,1,0,0,0,1,-2,1,0,0,0,1,-2,1,0,
 0,0,1,-2,1,0,0,0,1,-2,1,0,0,0,1,-2,1,0,0,0,1,-2,1,
 0,0,0,1,-2,1,0,0,0,1,-2,1,0,0,0,1,-2,1]