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.

A128890 Triangle T(n,k) related to walks in the positive quadrant.

Table of values

n a(n)
0 1
1 0
2 1
3 2
4 0
5 1
6 0
7 5
8 0
9 1
10 10
11 0
12 9
13 0
14 1
15 0
16 35
17 0
18 14
19 0
20 1
21 70
22 0
23 84
24 0
25 20
26 0
27 1
28 0
29 294
30 0
31 168
32 0
33 27
34 0
35 1
36 588
37 0
38 840
39 0
40 300
41 0
42 35
43 0
44 1
45 0
46 2772
47 0
48 1980
49 0
50 495
51 0
52 44
53 0
54 1

List of values

[1, 0, 1, 2, 0, 1, 0, 5, 0, 1, 10, 0, 9, 0, 1, 0, 35, 0, 14, 0, 1, 70, 0, 84, 0, 20, 0, 1, 0, 294, 0, 168, 0, 27, 0, 1, 588, 0, 840, 0, 300, 0, 35, 0, 1, 0, 2772, 0, 1980, 0, 495, 0, 44, 0, 1]