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A011638号作为一个简单的表

n个a(n)
01
10
20
-1
40
50
60
70
80
91
100
110
12-1
130
140
150
160
170
181
190
200
210
220
230
24-1
250
260
271
280
290
300
310
320
33-1
340
350
361

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