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.

A070243 a(n) = Card{ k, phi(k) <= n }.

Table of values

n a(n)
1 2
2 5
3 5
4 9
5 9
6 13
7 13
8 18
9 18
10 20
11 20
12 26
13 26
14 26
15 26
16 32
17 32
18 36
19 36
20 41
21 41
22 43
23 43
24 53
25 53
26 53
27 53
28 55
29 55
30 57
31 57
32 64
33 64
34 64
35 64
36 72
37 72
38 72
39 72
40 81
41 81
42 85
43 85
44 88
45 88
46 90
47 90
48 101
49 101
50 101
51 101
52 103
53 103
54 105
55 105
56 108
57 108
58 110
59 110
60 119
61 119
62 119
63 119
64 127
65 127

List of values

[2, 5, 5, 9, 9, 13, 13, 18, 18, 20, 20, 26, 26, 26, 26, 32, 32, 36, 36, 41, 41, 43, 43, 53, 53, 53, 53, 55, 55, 57, 57, 64, 64, 64, 64, 72, 72, 72, 72, 81, 81, 85, 85, 88, 88, 90, 90, 101, 101, 101, 101, 103, 103, 105, 105, 108, 108, 110, 110, 119, 119, 119, 119, 127, 127]