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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.

A163109 a(n) = phi(tau(n)).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 1
6 2
7 1
8 2
9 2
10 2
11 1
12 2
13 1
14 2
15 2
16 4
17 1
18 2
19 1
20 2
21 2
22 2
23 1
24 4
25 2
26 2
27 2
28 2
29 1
30 4
31 1
32 2
33 2
34 2
35 2
36 6
37 1
38 2
39 2
40 4
41 1
42 4
43 1
44 2
45 2
46 2
47 1
48 4
49 2
50 2
51 2
52 2
53 1
54 4
55 2
56 4
57 2
58 2
59 1
60 4
61 1
62 2
63 2
64 6
65 2
66 4
67 1
68 2
69 2
70 4
71 1
72 4
73 1
74 2
75 2
76 2
77 2
78 4
79 1
80 4
81 4
82 2
83 1
84 4
85 2
86 2
87 2
88 4
89 1
90 4
91 2
92 2
93 2
94 2
95 2
96 4
97 1
98 2
99 2
100 6
101 1
102 4
103 1
104 4
105 4

List of values

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

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