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A278513 as a simple table

na(n)
1-1
21
30
4-1
51
60
70
81
90
100
11-1
120
131
141
150
16-1
170
180
191
20-1
210
22-1
230
240
25-1
26-1
270
280
29-1
300
31-1
321
330
340
351
360
370
38-1
39-1
400
410
421
430
440
451
460
470
48-1
491
500
51-1
521
530
540
55-1
560
571
581
590
600
61-1
620
630
64-1
650
66-1
671
68-1
690
700
71-1
720
730
741
750
761
771
780
791
801
810
82-1
83-1
84-1
850
860
870
880
890
90-1
91-1
920
931
940
950
961
970
980
990
100-1
1010
102-1
103-1
1040
1051
1060
1070
1081
1091
1100
1110
1121

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