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.

A257339 Arrange numbers in a single clockwise spiral so that each number is relatively prime to its eight neighbors.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 4
6 7
7 6
8 11
9 9
10 13
11 17
12 19
13 8
14 23
15 29
16 21
17 25
18 31
19 37
20 41
21 35
22 43
23 47
24 10
25 49
26 12
27 53
28 14
29 15
30 59
31 27
32 55
33 39
34 16
35 61
36 22
37 51
38 67
39 18
40 65
41 24
42 71
43 26
44 33
45 32
46 57
47 73
48 79
49 83
50 77
51 85
52 89
53 97
54 101
55 28
56 95
57 34
58 91
59 38
60 103
61 107
62 45
63 109
64 113
65 20
66 121

List of values

[1, 2, 3, 5, 4, 7, 6, 11, 9, 13, 17, 19, 8, 23, 29, 21, 25, 31, 37, 41, 35, 43, 47, 10, 49, 12, 53, 14, 15, 59, 27, 55, 39, 16, 61, 22, 51, 67, 18, 65, 24, 71, 26, 33, 32, 57, 73, 79, 83, 77, 85, 89, 97, 101, 28, 95, 34, 91, 38, 103, 107, 45, 109, 113, 20, 121]

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

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