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.

A124428 Triangle, read by rows: T(n,k) = binomial(floor(n/2),k)*binomial(floor((n+1)/2),k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 2
6 1
7 4
8 1
9 1
10 6
11 3
12 1
13 9
14 9
15 1
16 1
17 12
18 18
19 4
20 1
21 16
22 36
23 16
24 1
25 1
26 20
27 60
28 40
29 5
30 1
31 25
32 100
33 100
34 25
35 1
36 1
37 30
38 150
39 200
40 75
41 6
42 1
43 36
44 225
45 400
46 225
47 36
48 1
49 1
50 42
51 315
52 700
53 525
54 126
55 7
56 1
57 49
58 441
59 1225
60 1225
61 441
62 49
63 1
64 1
65 56
66 588
67 1960
68 2450
69 1176
70 196
71 8

List of values

[1, 1, 1, 1, 1, 2, 1, 4, 1, 1, 6, 3, 1, 9, 9, 1, 1, 12, 18, 4, 1, 16, 36, 16, 1, 1, 20, 60, 40, 5, 1, 25, 100, 100, 25, 1, 1, 30, 150, 200, 75, 6, 1, 36, 225, 400, 225, 36, 1, 1, 42, 315, 700, 525, 126, 7, 1, 49, 441, 1225, 1225, 441, 49, 1, 1, 56, 588, 1960, 2450, 1176, 196, 8]