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.

A037225 a(n) = phi(2n+1).

Table of values

n a(n)
0 1
1 2
2 4
3 6
4 6
5 10
6 12
7 8
8 16
9 18
10 12
11 22
12 20
13 18
14 28
15 30
16 20
17 24
18 36
19 24
20 40
21 42
22 24
23 46
24 42
25 32
26 52
27 40
28 36
29 58
30 60
31 36
32 48
33 66
34 44
35 70
36 72
37 40
38 60
39 78
40 54
41 82
42 64
43 56
44 88
45 72
46 60
47 72
48 96
49 60
50 100
51 102
52 48
53 106
54 108
55 72
56 112
57 88
58 72
59 96
60 110
61 80
62 100
63 126
64 84
65 130

List of values

[1, 2, 4, 6, 6, 10, 12, 8, 16, 18, 12, 22, 20, 18, 28, 30, 20, 24, 36, 24, 40, 42, 24, 46, 42, 32, 52, 40, 36, 58, 60, 36, 48, 66, 44, 70, 72, 40, 60, 78, 54, 82, 64, 56, 88, 72, 60, 72, 96, 60, 100, 102, 48, 106, 108, 72, 112, 88, 72, 96, 110, 80, 100, 126, 84, 130]