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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.

A071661 Permutation A057505 applied twice ("squared").

Table of values

n a(n)
0 0
1 1
2 2
3 3
4 4
5 6
6 7
7 5
8 8
9 9
10 14
11 16
12 11
13 19
14 17
15 20
16 12
17 10
18 15
19 21
20 18
21 13
22 22
23 23
24 37
25 42
26 28
27 51
28 44
29 53
30 30
31 25
32 39
33 56
34 47
35 33
36 60
37 45
38 54
39 57
40 48
41 61
42 31
43 34
44 26
45 24
46 38
47 40
48 43
49 29
50 52
51 58
52 62
53 49
54 46
55 55
56 35
57 32
58 27
59 41
60 63
61 59
62 50
63 36
64 64
65 65
66 107
67 121
68 79
69 149
70 126

List of values

[0, 1, 2, 3, 4, 6, 7, 5, 8, 9, 14, 16, 11, 19, 17, 20, 12, 10, 15, 21, 18, 13, 22, 23, 37, 42, 28, 51, 44, 53, 30, 25, 39, 56, 47, 33, 60, 45, 54, 57, 48, 61, 31, 34, 26, 24, 38, 40, 43, 29, 52, 58, 62, 49, 46, 55, 35, 32, 27, 41, 63, 59, 50, 36, 64, 65, 107, 121, 79, 149, 126]

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