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.

A141114 Positive integers k where d(d(k)) is coprime to k, where d(k) is the number of divisors of k.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 8
6 9
7 10
8 11
9 13
10 14
11 17
12 19
13 22
14 23
15 25
16 26
17 29
18 31
19 34
20 35
21 37
22 38
23 41
24 43
25 45
26 46
27 47
28 49
29 53
30 55
31 58
32 59
33 61
34 62
35 63
36 65
37 67
38 71
39 73
40 74
41 75
42 77
43 79
44 81
45 82
46 83
47 85
48 86
49 89
50 91
51 94
52 95
53 97
54 99
55 100
56 101
57 103
58 105
59 106
60 107
61 109
62 113
63 115
64 117
65 118
66 119
67 121

List of values

[1, 3, 5, 7, 8, 9, 10, 11, 13, 14, 17, 19, 22, 23, 25, 26, 29, 31, 34, 35, 37, 38, 41, 43, 45, 46, 47, 49, 53, 55, 58, 59, 61, 62, 63, 65, 67, 71, 73, 74, 75, 77, 79, 81, 82, 83, 85, 86, 89, 91, 94, 95, 97, 99, 100, 101, 103, 105, 106, 107, 109, 113, 115, 117, 118, 119, 121]

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

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