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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.

A055734 Number of distinct primes dividing phi(n).

Table of values

n a(n)
1 0
2 0
3 1
4 1
5 1
6 1
7 2
8 1
9 2
10 1
11 2
12 1
13 2
14 2
15 1
16 1
17 1
18 2
19 2
20 1
21 2
22 2
23 2
24 1
25 2
26 2
27 2
28 2
29 2
30 1
31 3
32 1
33 2
34 1
35 2
36 2
37 2
38 2
39 2
40 1
41 2
42 2
43 3
44 2
45 2
46 2
47 2
48 1
49 3
50 2
51 1
52 2
53 2
54 2
55 2
56 2
57 2
58 2
59 2
60 1
61 3
62 3
63 2
64 1
65 2
66 2
67 3
68 1
69 2
70 2
71 3
72 2
73 2
74 2
75 2
76 2
77 3
78 2
79 3
80 1
81 2
82 2
83 2
84 2
85 1
86 3
87 2
88 2
89 2
90 2
91 2
92 2
93 3
94 2
95 2
96 1
97 2
98 3
99 3
100 2
101 2
102 1
103 3
104 2
105 2

List of values

[0, 0, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 2, 1, 1, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 1, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 3, 2, 2, 2, 2, 1, 3, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 3, 3, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 3, 1, 2, 2, 2, 2, 1, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 1, 2, 3, 3, 2, 2, 1, 3, 2, 2]

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