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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.

A222216 In the number n, replace all (decimal) digits 0 with 7 and vice versa.

Table of values

n a(n)
0 7
1 1
2 2
3 3
4 4
5 5
6 6
7 0
8 8
9 9
10 17
11 11
12 12
13 13
14 14
15 15
16 16
17 10
18 18
19 19
20 27
21 21
22 22
23 23
24 24
25 25
26 26
27 20
28 28
29 29
30 37
31 31
32 32
33 33
34 34
35 35
36 36
37 30
38 38
39 39
40 47
41 41
42 42
43 43
44 44
45 45
46 46
47 40
48 48
49 49
50 57
51 51
52 52
53 53
54 54
55 55
56 56
57 50
58 58
59 59
60 67
61 61
62 62
63 63
64 64
65 65
66 66
67 60
68 68
69 69
70 7
71 1
72 2
73 3
74 4
75 5

List of values

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

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