# A066330 (b-file synthesized from sequence entry)
0 0
1 1
2 10
3 11
4 100
5 1000
6 1001
7 1010
8 1011
9 1100
10 1101
11 1110
12 1111
13 -1
14 -1
15 -1
16 10000
17 10001
18 10010
19 10011
20 10100
21 11000
22 11001
23 11010
24 11011
25 11100
26 11101
27 11110
28 11111
29 -1
30 -1
31 -1
32 100000
33 100001
34 100010
35 100011
36 100100
37 101000
38 101001
39 101010
40 101011
41 101100
42 101101
43 101110
44 101111
45 -1
46 -1
47 -1