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A066327 as a simple table

na(n)
00
110
2101
3100
4110
51001
61000
71010
81101
91100
101110
11-1
12-1
13-1
14-1
1510001
1610000
1710010
1810101
1910100
2010110
2111001
2211000
2311010
2411101
2511100
2611110
27-1
28-1
29-1
30-1
31100001
32100000
33100010
34100101
35100100
36100110
37101001
38101000
39101010
40101101
41101100
42101110
43-1
44-1
45-1
46-1
47110001

[0,10,101,100,110,1001,1000,1010,1101,1100,1110,
 -1,-1,-1,-1,10001,10000,10010,10101,10100,10110,
 11001,11000,11010,11101,11100,11110,-1,-1,-1,-1,
 100001,100000,100010,100101,100100,100110,101001,
 101000,101010,101101,101100,101110,-1,-1,-1,-1,
 110001]