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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.

A130508 a(1)=2. a(2)=3. a(3)=1. a(n+3) = 3 + a(n), for all positive integers n.

Table of values

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

List of values

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

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

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