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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.

A212179 Number of distinct prime factors of A181800(n) (n-th powerful number that is the first integer of its prime signature).

Table of values

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

List of values

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

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