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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.

A163367 a(n) = phi(tau(sigma(n))).

Table of values

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

List of values

[1, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 4, 4, 1, 2, 2, 2, 4, 2, 6, 4, 4, 1, 4, 4, 4, 4, 4, 2, 2, 4, 4, 4, 2, 2, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 2, 2, 2, 4, 2, 4, 8, 4, 8, 4, 4, 4, 8, 2, 4, 4, 1, 4, 8, 2, 4, 4, 8, 4, 4, 2, 4, 2, 4, 4, 8, 4, 4, 2, 4, 4, 4, 4, 4]

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