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.

A011862 a(n) = floor(n*(n-1)/9).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 2
6 3
7 4
8 6
9 8
10 10
11 12
12 14
13 17
14 20
15 23
16 26
17 30
18 34
19 38
20 42
21 46
22 51
23 56
24 61
25 66
26 72
27 78
28 84
29 90
30 96
31 103
32 110
33 117
34 124
35 132
36 140
37 148
38 156
39 164
40 173
41 182
42 191
43 200
44 210
45 220
46 230
47 240
48 250
49 261
50 272
51 283
52 294
53 306
54 318
55 330
56 342
57 354
58 367
59 380
60 393
61 406
62 420

List of values

[0, 0, 0, 0, 1, 2, 3, 4, 6, 8, 10, 12, 14, 17, 20, 23, 26, 30, 34, 38, 42, 46, 51, 56, 61, 66, 72, 78, 84, 90, 96, 103, 110, 117, 124, 132, 140, 148, 156, 164, 173, 182, 191, 200, 210, 220, 230, 240, 250, 261, 272, 283, 294, 306, 318, 330, 342, 354, 367, 380, 393, 406, 420]