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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.

A251138 Number of distinct prime factors of A098550(n).

Table of values

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

List of values

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

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