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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.

A385974 a(n) = the number of reduced positive proper fractions p/q with phi(q) <= n.

Table of values

n a(n)
1 1
2 7
3 7
4 23
5 23
6 47
7 47
8 87
9 87
10 107
11 107
12 179
13 179
14 179
15 179
16 275
17 275
18 347
19 347
20 447
21 447
22 491
23 491
24 731
25 731
26 731
27 731
28 787
29 787
30 847
31 847
32 1071
33 1071
34 1071
35 1071
36 1359
37 1359
38 1359
39 1359
40 1719
41 1719
42 1887
43 1887
44 2019
45 2019
46 2111
47 2111
48 2639
49 2639
50 2639
51 2639
52 2743
53 2743
54 2851
55 2851

List of values

[1, 7, 7, 23, 23, 47, 47, 87, 87, 107, 107, 179, 179, 179, 179, 275, 275, 347, 347, 447, 447, 491, 491, 731, 731, 731, 731, 787, 787, 847, 847, 1071, 1071, 1071, 1071, 1359, 1359, 1359, 1359, 1719, 1719, 1887, 1887, 2019, 2019, 2111, 2111, 2639, 2639, 2639, 2639, 2743, 2743, 2851, 2851]

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

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