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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.

A143091 a(n) = a(floor(2n/3)) + a(floor(n/3)) starting a(0)=a(1)=1.

Table of values

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

List of values

[1, 1, 2, 3, 3, 4, 5, 5, 6, 8, 8, 8, 9, 9, 11, 12, 12, 12, 14, 14, 14, 16, 16, 17, 18, 18, 18, 22, 22, 22, 22, 22, 24, 24, 24, 25, 27, 27, 27, 27, 27, 31, 33, 33, 33, 34, 34, 34, 36, 36, 36, 36, 36, 37, 41, 41, 41, 41, 41, 41, 41, 41, 45, 49, 49, 49, 49, 49, 50, 51, 51, 51, 54, 54]

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

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