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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.

A292995 Sum of digits of 3^n (A004166) divided by 9.

Table of values

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

List of values

[0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 2, 3, 5, 4, 3, 3, 5, 4, 5, 3, 5, 6, 6, 7, 7, 9, 8, 8, 7, 9, 7, 8, 11, 9, 9, 10, 10, 9, 10, 11, 10, 12, 10, 11, 12, 14, 13, 12, 16, 13, 13, 15, 12, 10, 10, 12, 14, 13, 11, 15, 17, 17, 16, 15, 13, 18, 17, 17, 16, 20, 18, 17, 19, 20, 17, 18]

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