# A072728 (b-file synthesized from sequence entry)
0 1
1 2
2 3
3 5
4 5
5 8
6 7
7 8
8 12
9 13
10 11
11 12
12 13
13 19
14 19
15 21
16 17
17 18
18 19
19 19
20 21
21 29
22 31
23 30
24 31
25 34
26 27
27 26
28 29
29 29
30 31
31 30
32 31
33 34
34 46
35 45
36 50
37 46
38 49
39 49
40 50
41 55
42 41
43 44
44 41
45 43
46 47
47 46
48 45
49 50
50 46
51 49
52 49
53 50
54 55