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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.

A305025 a(n) = A001221(A004394(n)).

Table of values

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

List of values

[0, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11]

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