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.

A034928 Triangle of ballot numbers.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 2
8 2
9 1
10 1
11 3
12 4
13 4
14 1
15 1
16 4
17 6
18 9
19 9
20 1
21 1
22 5
23 8
24 15
25 21
26 21
27 1
28 1
29 6
30 10
31 22
32 36
33 51
34 51
35 1
36 1
37 7
38 12
39 30
40 54
41 91
42 127
43 127
44 1
45 1
46 8
47 14
48 39
49 75
50 142
51 232
52 323
53 323
54 1
55 1
56 9
57 16
58 49
59 99
60 205
61 370
62 603
63 835
64 835
65 1
66 1
67 10
68 18
69 60
70 126
71 281
72 545

List of values

[1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 3, 4, 4, 1, 1, 4, 6, 9, 9, 1, 1, 5, 8, 15, 21, 21, 1, 1, 6, 10, 22, 36, 51, 51, 1, 1, 7, 12, 30, 54, 91, 127, 127, 1, 1, 8, 14, 39, 75, 142, 232, 323, 323, 1, 1, 9, 16, 49, 99, 205, 370, 603, 835, 835, 1, 1, 10, 18, 60, 126, 281, 545]