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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.

A297031 Number of pieces in the list d(m), d(m-1), ..., d(0) of base-3 digits of n; see Comments.

Table of values

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

List of values

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

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