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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.

A069924 Number of k, 1<=k<=n, such that phi(k) divides k.

Table of values

n a(n)
1 1
2 2
3 2
4 3
5 3
6 4
7 4
8 5
9 5
10 5
11 5
12 6
13 6
14 6
15 6
16 7
17 7
18 8
19 8
20 8
21 8
22 8
23 8
24 9
25 9
26 9
27 9
28 9
29 9
30 9
31 9
32 10
33 10
34 10
35 10
36 11
37 11
38 11
39 11
40 11
41 11
42 11
43 11
44 11
45 11
46 11
47 11
48 12
49 12
50 12
51 12
52 12
53 12
54 13
55 13
56 13
57 13
58 13
59 13
60 13
61 13
62 13
63 13
64 14
65 14
66 14
67 14
68 14
69 14
70 14
71 14
72 15
73 15
74 15
75 15
76 15
77 15
78 15
79 15

List of values

[1, 2, 2, 3, 3, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15]

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