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.

A011875 a(n) = floor(n*(n-1)/22).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 1
7 1
8 2
9 3
10 4
11 5
12 6
13 7
14 8
15 9
16 10
17 12
18 13
19 15
20 17
21 19
22 21
23 23
24 25
25 27
26 29
27 31
28 34
29 36
30 39
31 42
32 45
33 48
34 51
35 54
36 57
37 60
38 63
39 67
40 70
41 74
42 78
43 82
44 86
45 90
46 94
47 98
48 102
49 106
50 111
51 115
52 120
53 125
54 130
55 135
56 140
57 145
58 150
59 155
60 160
61 166
62 171
63 177
64 183
65 189
66 195
67 201
68 207

List of values

[0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 34, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 67, 70, 74, 78, 82, 86, 90, 94, 98, 102, 106, 111, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 166, 171, 177, 183, 189, 195, 201, 207]