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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.

A083220 a(n) = n + (n mod 4).

Table of values

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

List of values

[0, 2, 4, 6, 4, 6, 8, 10, 8, 10, 12, 14, 12, 14, 16, 18, 16, 18, 20, 22, 20, 22, 24, 26, 24, 26, 28, 30, 28, 30, 32, 34, 32, 34, 36, 38, 36, 38, 40, 42, 40, 42, 44, 46, 44, 46, 48, 50, 48, 50, 52, 54, 52, 54, 56, 58, 56, 58, 60, 62, 60, 62, 64, 66, 64, 66, 68, 70, 68, 70, 72, 74]

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

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