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.

A178821 Triangle read by rows: T(n,k) = binomial(n+4,4) * binomial(n,k), 0 <= k <= n.

Table of values

n a(n)
0 1
1 5
2 5
3 15
4 30
5 15
6 35
7 105
8 105
9 35
10 70
11 280
12 420
13 280
14 70
15 126
16 630
17 1260
18 1260
19 630
20 126
21 210
22 1260
23 3150
24 4200
25 3150
26 1260
27 210
28 330
29 2310
30 6930
31 11550
32 11550
33 6930
34 2310
35 330
36 495
37 3960
38 13860
39 27720
40 34650
41 27720
42 13860
43 3960
44 495
45 715
46 6435
47 25740
48 60060
49 90090
50 90090
51 60060
52 25740
53 6435
54 715

List of values

[1, 5, 5, 15, 30, 15, 35, 105, 105, 35, 70, 280, 420, 280, 70, 126, 630, 1260, 1260, 630, 126, 210, 1260, 3150, 4200, 3150, 1260, 210, 330, 2310, 6930, 11550, 11550, 6930, 2310, 330, 495, 3960, 13860, 27720, 34650, 27720, 13860, 3960, 495, 715, 6435, 25740, 60060, 90090, 90090, 60060, 25740, 6435, 715]