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.

A268759 Triangle T(n,k) read by rows: T(n,k) = (1/4)*(1 + k)*(2 + k)*(k - n)*(1 + k - n).

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 0
5 0
6 3
7 3
8 0
9 0
10 6
11 9
12 6
13 0
14 0
15 10
16 18
17 18
18 10
19 0
20 0
21 15
22 30
23 36
24 30
25 15
26 0
27 0
28 21
29 45
30 60
31 60
32 45
33 21
34 0
35 0
36 28
37 63
38 90
39 100
40 90
41 63
42 28
43 0
44 0
45 36
46 84
47 126
48 150
49 150
50 126
51 84
52 36
53 0
54 0
55 45
56 108
57 168
58 210
59 225
60 210
61 168
62 108
63 45
64 0
65 0
66 55
67 135
68 216
69 280
70 315

List of values

[0, 0, 0, 1, 0, 0, 3, 3, 0, 0, 6, 9, 6, 0, 0, 10, 18, 18, 10, 0, 0, 15, 30, 36, 30, 15, 0, 0, 21, 45, 60, 60, 45, 21, 0, 0, 28, 63, 90, 100, 90, 63, 28, 0, 0, 36, 84, 126, 150, 150, 126, 84, 36, 0, 0, 45, 108, 168, 210, 225, 210, 168, 108, 45, 0, 0, 55, 135, 216, 280, 315]