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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.

A074679 Signature permutation of a Catalan automorphism: Rotate binary tree left if possible, otherwise swap its sides.

Table of values

n a(n)
0 0
1 1
2 3
3 2
4 6
5 7
6 8
7 4
8 5
9 14
10 15
11 16
12 17
13 18
14 19
15 20
16 21
17 9
18 10
19 22
20 11
21 12
22 13
23 37
24 38
25 39
26 40
27 41
28 42
29 43
30 44
31 45
32 46
33 47
34 48
35 49
36 50
37 51
38 52
39 53
40 54
41 55
42 56
43 57
44 58
45 23
46 24
47 59
48 25
49 26
50 27
51 60
52 61
53 62
54 28
55 29
56 63
57 30
58 31
59 32
60 64
61 33
62 34
63 35
64 36
65 107
66 108
67 109
68 110
69 111

List of values

[0, 1, 3, 2, 6, 7, 8, 4, 5, 14, 15, 16, 17, 18, 19, 20, 21, 9, 10, 22, 11, 12, 13, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 23, 24, 59, 25, 26, 27, 60, 61, 62, 28, 29, 63, 30, 31, 32, 64, 33, 34, 35, 36, 107, 108, 109, 110, 111]

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

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