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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.

A057506 Signature-permutation of a Catalan Automorphism: (inverse of) "Donaghey's map M", acting on the parenthesizations encoded by A014486.

Table of values

n a(n)
0 0
1 1
2 3
3 2
4 8
5 6
6 7
7 5
8 4
9 22
10 19
11 20
12 15
13 14
14 21
15 16
16 18
17 13
18 11
19 17
20 12
21 10
22 9
23 64
24 60
25 61
26 52
27 51
28 62
29 53
30 55
31 41
32 39
33 54
34 40
35 38
36 37
37 63
38 56
39 57
40 43
41 42
42 59
43 47
44 50
45 36
46 33
47 48
48 34
49 29
50 28
51 58
52 44
53 49
54 35
55 30
56 46
57 32
58 27
59 25
60 45
61 31
62 26
63 24
64 23
65 196
66 191
67 192
68 178
69 177

List of values

[0, 1, 3, 2, 8, 6, 7, 5, 4, 22, 19, 20, 15, 14, 21, 16, 18, 13, 11, 17, 12, 10, 9, 64, 60, 61, 52, 51, 62, 53, 55, 41, 39, 54, 40, 38, 37, 63, 56, 57, 43, 42, 59, 47, 50, 36, 33, 48, 34, 29, 28, 58, 44, 49, 35, 30, 46, 32, 27, 25, 45, 31, 26, 24, 23, 196, 191, 192, 178, 177]

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

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