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.

A117724 Triangle T(n,k) = coefficient [x^n] of x^2/(1-(k+1)*x^2-x^3) for row n, and columns k = 0..n, read by rows.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 1
5 1
6 0
7 0
8 0
9 0
10 1
11 2
12 3
13 4
14 5
15 1
16 1
17 1
18 1
19 1
20 1
21 1
22 4
23 9
24 16
25 25
26 36
27 49
28 2
29 4
30 6
31 8
32 10
33 12
34 14
35 16
36 2
37 9
38 28
39 65
40 126
41 217
42 344
43 513
44 730
45 3
46 12
47 27
48 48
49 75
50 108
51 147
52 192
53 243
54 300
55 4
56 22
57 90
58 268
59 640
60 1314
61 2422
62 4120
63 6588
64 10030
65 14674

List of values

[0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 2, 3, 4, 5, 1, 1, 1, 1, 1, 1, 1, 4, 9, 16, 25, 36, 49, 2, 4, 6, 8, 10, 12, 14, 16, 2, 9, 28, 65, 126, 217, 344, 513, 730, 3, 12, 27, 48, 75, 108, 147, 192, 243, 300, 4, 22, 90, 268, 640, 1314, 2422, 4120, 6588, 10030, 14674]