cp's OEIS Frontend

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.

A057546 Number of Catalan objects of size n fixed by Catalan Automorphism A057511/A057512 (deep rotation of general parenthesizations/plane trees).

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 5
5 6
6 10
7 11
8 18
9 21
10 34
11 35
12 68
13 69
14 137
15 148
16 316
17 317
18 759
19 760
20 1869
21 1915
22 4833
23 4834
24 12796
25 12802
26 34108
27 34384
28 92792
29 92793
30 254752
31 254753
32 703083
33 704956
34 1958210
35 1958231
36 5485330
37 5485331
38 15427026
39 15440591
40 43618394
41 43618395
42 123807695
43 123807696
44 352561832
45 352664217
46 1007481494
47 1007481495
48 2887387009

List of values

[1, 1, 2, 3, 5, 6, 10, 11, 18, 21, 34, 35, 68, 69, 137, 148, 316, 317, 759, 760, 1869, 1915, 4833, 4834, 12796, 12802, 34108, 34384, 92792, 92793, 254752, 254753, 703083, 704956, 1958210, 1958231, 5485330, 5485331, 15427026, 15440591, 43618394, 43618395, 123807695, 123807696, 352561832, 352664217, 1007481494, 1007481495, 2887387009]

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

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