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.

A008331 a(n) = phi(prime(n)+1).

Table of values

n a(n)
1 2
2 2
3 2
4 4
5 4
6 6
7 6
8 8
9 8
10 8
11 16
12 18
13 12
14 20
15 16
16 18
17 16
18 30
19 32
20 24
21 36
22 32
23 24
24 24
25 42
26 32
27 48
28 36
29 40
30 36
31 64
32 40
33 44
34 48
35 40
36 72
37 78
38 80
39 48
40 56
41 48
42 72
43 64
44 96
45 60
46 80
47 104
48 96
49 72
50 88
51 72
52 64
53 110
54 72
55 84
56 80
57 72
58 128
59 138
60 92
61 140
62 84
63 120
64 96
65 156
66 104
67 164
68 156
69 112
70 120
71 116

List of values

[2, 2, 2, 4, 4, 6, 6, 8, 8, 8, 16, 18, 12, 20, 16, 18, 16, 30, 32, 24, 36, 32, 24, 24, 42, 32, 48, 36, 40, 36, 64, 40, 44, 48, 40, 72, 78, 80, 48, 56, 48, 72, 64, 96, 60, 80, 104, 96, 72, 88, 72, 64, 110, 72, 84, 80, 72, 128, 138, 92, 140, 84, 120, 96, 156, 104, 164, 156, 112, 120, 116]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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