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.

A131115 Triangle read by rows: T(n,k) = 7*binomial(n,k) for 1 <= k <= n with T(n,n) = 1 for n >= 0.

Table of values

n a(n)
0 1
1 7
2 1
3 7
4 14
5 1
6 7
7 21
8 21
9 1
10 7
11 28
12 42
13 28
14 1
15 7
16 35
17 70
18 70
19 35
20 1
21 7
22 42
23 105
24 140
25 105
26 42
27 1
28 7
29 49
30 147
31 245
32 245
33 147
34 49
35 1
36 7
37 56
38 196
39 392
40 490
41 392
42 196
43 56
44 1
45 7
46 63
47 252
48 588
49 882
50 882
51 588
52 252
53 63
54 1
55 7
56 70
57 315
58 840
59 1470
60 1764
61 1470
62 840
63 315
64 70
65 1

List of values

[1, 7, 1, 7, 14, 1, 7, 21, 21, 1, 7, 28, 42, 28, 1, 7, 35, 70, 70, 35, 1, 7, 42, 105, 140, 105, 42, 1, 7, 49, 147, 245, 245, 147, 49, 1, 7, 56, 196, 392, 490, 392, 196, 56, 1, 7, 63, 252, 588, 882, 882, 588, 252, 63, 1, 7, 70, 315, 840, 1470, 1764, 1470, 840, 315, 70, 1]