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.

A325516 Triangle read by rows: T(n, k) = (1/4)*n*(1 - (-1)^(n - k) + 2*(n - k)^2), with 0 <= k < n.

Table of values

n a(n)
1 1
2 4
3 2
4 15
5 6
6 3
7 32
8 20
9 8
10 4
11 65
12 40
13 25
14 10
15 5
16 108
17 78
18 48
19 30
20 12
21 6
22 175
23 126
24 91
25 56
26 35
27 14
28 7
29 256
30 200
31 144
32 104
33 64
34 40
35 16
36 8
37 369
38 288
39 225
40 162
41 117
42 72
43 45
44 18
45 9
46 500
47 410
48 320
49 250
50 180
51 130
52 80
53 50
54 20
55 10
56 671
57 550
58 451
59 352
60 275
61 198
62 143
63 88
64 55
65 22
66 11

List of values

[1, 4, 2, 15, 6, 3, 32, 20, 8, 4, 65, 40, 25, 10, 5, 108, 78, 48, 30, 12, 6, 175, 126, 91, 56, 35, 14, 7, 256, 200, 144, 104, 64, 40, 16, 8, 369, 288, 225, 162, 117, 72, 45, 18, 9, 500, 410, 320, 250, 180, 130, 80, 50, 20, 10, 671, 550, 451, 352, 275, 198, 143, 88, 55, 22, 11]