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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.

A358061 a(n) = phi(n) mod tau(n).

Table of values

n a(n)
1 0
2 1
3 0
4 2
5 0
6 2
7 0
8 0
9 0
10 0
11 0
12 4
13 0
14 2
15 0
16 3
17 0
18 0
19 0
20 2
21 0
22 2
23 0
24 0
25 2
26 0
27 2
28 0
29 0
30 0
31 0
32 4
33 0
34 0
35 0
36 3
37 0
38 2
39 0
40 0
41 0
42 4
43 0
44 2
45 0
46 2
47 0
48 6
49 0
50 2
51 0
52 0
53 0
54 2
55 0
56 0
57 0
58 0
59 0
60 4
61 0
62 2
63 0
64 4
65 0
66 4
67 0
68 2
69 0
70 0
71 0
72 0
73 0
74 0
75 4
76 0
77 0
78 0
79 0
80 2
81 4
82 0
83 0
84 0
85 0
86 2
87 0
88 0
89 0
90 0

List of values

[0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0, 4, 0, 2, 0, 3, 0, 0, 0, 2, 0, 2, 0, 0, 2, 0, 2, 0, 0, 0, 0, 4, 0, 0, 0, 3, 0, 2, 0, 0, 0, 4, 0, 2, 0, 2, 0, 6, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 4, 0, 2, 0, 4, 0, 4, 0, 2, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 2, 4, 0, 0, 0, 0, 2, 0, 0, 0, 0]

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