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A014906 as a simple table

na(n)
01
1-1
20
31
4-1
50
61
7-1
80
91
10-1
110
121
130
14-1
151
160
17-1
181
190
20-1
211
220
230
240
250
261
27-1
280
291
30-1
310
321
33-1
340
351
360
37-1
381
390
40-1
411
420
43-1
441
450
460
470
480
491
50-1
510
521
53-1
540
551
56-1
570
581
590
60-1
611
620
63-1
641
650
66-1
671
680
69-1
701
710
720
730
740
750
760
770
780
790
800

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