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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A125981 Signature-permutation of Deutsch's 2000 bijection on ordered trees.

Table of values

n a(n)
0 0
1 1
2 3
3 2
4 7
5 8
6 5
7 6
8 4
9 17
10 18
11 20
12 22
13 21
14 12
15 13
16 15
17 16
18 19
19 10
20 11
21 14
22 9
23 45
24 46
25 48
26 50
27 49
28 54
29 55
30 61
31 63
32 64
33 57
34 59
35 62
36 58
37 31
38 32
39 34
40 36
41 35
42 40
43 41
44 43
45 44
46 47
47 52
48 53
49 60
50 56
51 26
52 27
53 29
54 30
55 33
56 38
57 39
58 42
59 51
60 24
61 25
62 28
63 37
64 23
65 129
66 130
67 132
68 134
69 133

List of values

[0, 1, 3, 2, 7, 8, 5, 6, 4, 17, 18, 20, 22, 21, 12, 13, 15, 16, 19, 10, 11, 14, 9, 45, 46, 48, 50, 49, 54, 55, 61, 63, 64, 57, 59, 62, 58, 31, 32, 34, 36, 35, 40, 41, 43, 44, 47, 52, 53, 60, 56, 26, 27, 29, 30, 33, 38, 39, 42, 51, 24, 25, 28, 37, 23, 129, 130, 132, 134, 133]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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