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.

A354224 Lexicographically earliest sequence of distinct positive integers such that a(1) = 1 and for any n > 1, the greatest common divisor of n and a(n) is a prime number.

Table of values

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

List of values

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

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

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