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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.

A045670 Digital sum (in base 10) of numbers in base 3 of the alternate number system.

Table of values

n a(n)
1 1
2 2
3 3
4 2
5 3
6 4
7 3
8 4
9 5
10 4
11 5
12 6
13 3
14 4
15 5
16 4
17 5
18 6
19 5
20 6
21 7
22 4
23 5
24 6
25 5
26 6
27 7
28 6
29 7
30 8
31 5
32 6
33 7
34 6
35 7
36 8
37 7
38 8
39 9
40 4
41 5
42 6
43 5
44 6
45 7
46 6
47 7
48 8
49 5
50 6
51 7
52 6
53 7
54 8
55 7
56 8
57 9
58 6
59 7
60 8
61 7
62 8
63 9
64 8
65 9
66 10
67 5
68 6
69 7
70 6
71 7
72 8
73 7
74 8
75 9
76 6
77 7
78 8
79 7
80 8
81 9
82 8
83 9
84 10
85 7
86 8
87 9
88 8
89 9
90 10

List of values

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

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