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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.

A212808 Irregular triangle read by rows: row n gives number of cycles of length k in map on Catalan family of size n.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 0
6 1
7 5
8 0
9 1
10 1
11 14
12 0
13 1
14 0
15 0
16 0
17 2
18 42
19 0
20 2
21 3
22 0
23 1
24 4
25 132
26 0
27 2
28 0
29 0
30 0
31 14
32 0
33 0
34 0
35 0
36 0
37 0
38 0
39 0
40 0
41 0
42 0
43 0
44 0
45 1
46 0
47 0
48 0
49 1
50 429
51 0
52 2
53 7
54 0
55 0
56 28
57 0
58 0
59 1
60 1
61 0
62 0
63 0
64 0
65 1
66 0
67 0
68 0
69 0
70 2
71 0
72 0
73 0
74 1

List of values

[1, 1, 1, 1, 2, 0, 1, 5, 0, 1, 1, 14, 0, 1, 0, 0, 0, 2, 42, 0, 2, 3, 0, 1, 4, 132, 0, 2, 0, 0, 0, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 429, 0, 2, 7, 0, 0, 28, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 1]

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

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