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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.

A304431 a(n+1) = 1 + min( 2*a(floor(n/2)), 3*a(floor(n/3)) ), with a(0) = 0.

Table of values

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

List of values

[0, 1, 1, 1, 3, 3, 3, 3, 3, 4, 4, 4, 4, 7, 7, 7, 7, 7, 7, 9, 9, 9, 9, 9, 9, 9, 9, 10, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 21, 21, 22, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27]

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