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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.

A062948 a(n) = H(A002808(n)) where H(n) is the half-totient function, H(n) = phi(n)/2: (A023022) and A002808(n) are the composites.

Table of values

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

List of values

[1, 1, 2, 3, 2, 2, 3, 4, 4, 3, 4, 6, 5, 4, 10, 6, 9, 6, 4, 8, 10, 8, 12, 6, 9, 12, 8, 6, 10, 12, 11, 8, 21, 10, 16, 12, 9, 20, 12, 18, 14, 8, 15, 18, 16, 24, 10, 16, 22, 12, 12, 18, 20, 18, 30, 12, 16, 27, 20, 12, 32, 21, 28, 20, 12, 36, 22, 30, 23, 36, 16, 21, 30, 20, 16, 24, 24, 26]

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