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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.

A261009 Write 2^n in base 3, add up the "digits".

Table of values

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

List of values

[1, 2, 2, 4, 4, 4, 4, 6, 4, 8, 8, 10, 10, 8, 10, 16, 12, 14, 12, 16, 14, 18, 16, 12, 10, 12, 14, 20, 20, 22, 24, 26, 24, 22, 22, 22, 18, 20, 26, 28, 28, 28, 26, 30, 30, 30, 26, 26, 26, 32, 38, 40, 38, 38, 28, 34, 40, 42, 38, 40, 46, 40, 38, 42, 48, 44, 42, 40, 42, 48, 48, 44]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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