# A004493 (b-file synthesized from sequence entry)
0 4
1 5
2 3
3 7
4 8
5 6
6 1
7 2
8 0
9 13
10 14
11 12
12 16
13 17
14 15
15 10
16 11
17 9
18 22
19 23
20 21
21 25
22 26
23 24
24 19
25 20
26 18
27 31
28 32
29 30
30 34
31 35
32 33
33 28
34 29
35 27
36 40
37 41
38 39
39 43
40 44
41 42
42 37
43 38
44 36
45 49
46 50
47 48
48 52
49 53
50 51
51 46
52 47
53 45
54 58
55 59
56 57
57 61