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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.

A108228 a(n) = (A003961(n) - 1)/2, a permutation of the nonnegative integers.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 3
6 7
7 5
8 13
9 12
10 10
11 6
12 22
13 8
14 16
15 17
16 40
17 9
18 37
19 11
20 31
21 27
22 19
23 14
24 67
25 24
26 25
27 62
28 49
29 15
30 52
31 18
32 121
33 32
34 28
35 38
36 112
37 20
38 34
39 42
40 94
41 21
42 82
43 23
44 58
45 87
46 43
47 26
48 202
49 60
50 73
51 47
52 76
53 29
54 187
55 45
56 148
57 57
58 46
59 30
60 157
61 33
62 55
63 137
64 364
65 59
66 97
67 35
68 85
69 72

List of values

[0, 1, 2, 4, 3, 7, 5, 13, 12, 10, 6, 22, 8, 16, 17, 40, 9, 37, 11, 31, 27, 19, 14, 67, 24, 25, 62, 49, 15, 52, 18, 121, 32, 28, 38, 112, 20, 34, 42, 94, 21, 82, 23, 58, 87, 43, 26, 202, 60, 73, 47, 76, 29, 187, 45, 148, 57, 46, 30, 157, 33, 55, 137, 364, 59, 97, 35, 85, 72]

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

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