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.

A008642 Quarter-squares repeated.

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 4
5 4
6 6
7 6
8 9
9 9
10 12
11 12
12 16
13 16
14 20
15 20
16 25
17 25
18 30
19 30
20 36
21 36
22 42
23 42
24 49
25 49
26 56
27 56
28 64
29 64
30 72
31 72
32 81
33 81
34 90
35 90
36 100
37 100
38 110
39 110
40 121
41 121
42 132
43 132
44 144
45 144
46 156
47 156
48 169
49 169
50 182
51 182
52 196
53 196
54 210
55 210
56 225
57 225

List of values

[1, 1, 2, 2, 4, 4, 6, 6, 9, 9, 12, 12, 16, 16, 20, 20, 25, 25, 30, 30, 36, 36, 42, 42, 49, 49, 56, 56, 64, 64, 72, 72, 81, 81, 90, 90, 100, 100, 110, 110, 121, 121, 132, 132, 144, 144, 156, 156, 169, 169, 182, 182, 196, 196, 210, 210, 225, 225]