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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.

A129608 Signature-permutation of a Catalan automorphism: swap the two rightmost subtrees of general trees.

Table of values

n a(n)
0 0
1 1
2 2
3 3
4 4
5 6
6 5
7 7
8 8
9 9
10 11
11 10
12 16
13 19
14 14
15 15
16 12
17 17
18 18
19 13
20 20
21 21
22 22
23 23
24 25
25 24
26 30
27 33
28 28
29 29
30 26
31 44
32 47
33 27
34 53
35 56
36 60
37 37
38 39
39 38
40 43
41 52
42 42
43 40
44 31
45 45
46 46
47 32
48 48
49 49
50 50
51 51
52 41
53 34
54 54
55 55
56 35
57 57
58 58
59 59
60 36
61 61
62 62
63 63
64 64
65 65
66 67
67 66
68 72
69 75
70 70
71 71

List of values

[0, 1, 2, 3, 4, 6, 5, 7, 8, 9, 11, 10, 16, 19, 14, 15, 12, 17, 18, 13, 20, 21, 22, 23, 25, 24, 30, 33, 28, 29, 26, 44, 47, 27, 53, 56, 60, 37, 39, 38, 43, 52, 42, 40, 31, 45, 46, 32, 48, 49, 50, 51, 41, 34, 54, 55, 35, 57, 58, 59, 36, 61, 62, 63, 64, 65, 67, 66, 72, 75, 70, 71]

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

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