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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.

A163376 a(n) = phi(tau(phi(n))).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 1
7 2
8 2
9 2
10 2
11 2
12 2
13 2
14 2
15 2
16 2
17 4
18 2
19 2
20 2
21 2
22 2
23 2
24 2
25 2
26 2
27 2
28 2
29 2
30 2
31 4
32 4
33 2
34 4
35 4
36 2
37 6
38 2
39 4
40 4
41 4
42 2
43 4
44 2
45 4
46 2
47 2
48 4
49 4
50 2
51 2
52 4
53 2
54 2
55 4
56 4
57 6
58 2
59 2
60 4
61 4
62 4
63 6
64 2
65 4
66 2
67 4
68 2
69 2
70 4
71 4
72 4
73 4
74 6
75 4
76 6
77 4
78 4
79 4
80 2
81 4
82 4
83 2
84 4
85 6
86 4
87 4
88 4
89 4
90 4

List of values

[1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 2, 4, 4, 2, 6, 2, 4, 4, 4, 2, 4, 2, 4, 2, 2, 4, 4, 2, 2, 4, 2, 2, 4, 4, 6, 2, 2, 4, 4, 4, 6, 2, 4, 2, 4, 2, 2, 4, 4, 4, 4, 6, 4, 6, 4, 4, 4, 2, 4, 4, 2, 4, 6, 4, 4, 4, 4, 4]

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