cp's OEIS Frontend

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.

A227113 Lexicographically earliest permutation of the natural numbers such that all pairs of even- and odd-indexed terms have a common divisor > 1.

Table of values

n a(n)
1 1
2 2
3 4
4 3
5 6
6 5
7 10
8 7
9 14
10 8
11 12
12 9
13 15
14 11
15 22
16 13
17 26
18 16
19 18
20 17
21 34
22 19
23 38
24 20
25 24
26 21
27 27
28 23
29 46
30 25
31 30
32 28
33 32
34 29
35 58
36 31
37 62
38 33
39 36
40 35
41 40
42 37
43 74
44 39
45 42
46 41
47 82
48 43
49 86
50 44
51 48
52 45
53 50
54 47
55 94
56 49
57 56
58 51
59 54
60 52
61 60
62 53
63 106
64 55
65 65
66 57
67 63

List of values

[1, 2, 4, 3, 6, 5, 10, 7, 14, 8, 12, 9, 15, 11, 22, 13, 26, 16, 18, 17, 34, 19, 38, 20, 24, 21, 27, 23, 46, 25, 30, 28, 32, 29, 58, 31, 62, 33, 36, 35, 40, 37, 74, 39, 42, 41, 82, 43, 86, 44, 48, 45, 50, 47, 94, 49, 56, 51, 54, 52, 60, 53, 106, 55, 65, 57, 63]

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

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