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.

A363938 Lexicographically earliest sequence of numbers in a hexagonal spiral such that their neighbors have no common prime factor.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 9
9 11
10 13
11 8
12 17
13 15
14 19
15 12
16 23
17 25
18 29
19 10
20 31
21 14
22 27
23 16
24 21
25 37
26 33
27 26
28 41
29 22
30 35
31 43
32 47
33 18
34 49
35 24
36 53
37 39
38 20
39 51
40 55
41 28
42 59
43 61
44 32
45 45
46 34
47 67
48 57
49 40
50 63
51 71
52 36
53 65
54 38
55 73
56 79
57 30
58 83
59 77
60 46
61 89
62 69
63 91
64 58
65 81
66 85
67 87

List of values

[1, 2, 3, 4, 5, 6, 7, 9, 11, 13, 8, 17, 15, 19, 12, 23, 25, 29, 10, 31, 14, 27, 16, 21, 37, 33, 26, 41, 22, 35, 43, 47, 18, 49, 24, 53, 39, 20, 51, 55, 28, 59, 61, 32, 45, 34, 67, 57, 40, 63, 71, 36, 65, 38, 73, 79, 30, 83, 77, 46, 89, 69, 91, 58, 81, 85, 87]

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

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