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.

A172414 Triangle read by rows: Catalan number C(n) repeated 2*n+1 times.

Table of values

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

List of values

[1, 1, 1, 1, 2, 2, 2, 2, 2, 5, 5, 5, 5, 5, 5, 5, 14, 14, 14, 14, 14, 14, 14, 14, 14, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 132, 132, 132, 132, 132, 132, 132, 132, 132, 132, 132, 132, 132, 429, 429, 429, 429, 429, 429, 429, 429, 429, 429, 429, 429, 429, 429, 429]

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

Content is available under The OEIS End-User License Agreement.