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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.

A076310 a(n) = floor(n/10) + 4*(n mod 10).

Table of values

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

List of values

[0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 7, 11, 15, 19, 23]

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