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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.

A227006 Numbers k such that k-1 is not squarefree or a prime divisor of k-1 is in the sequence.

Table of values

n a(n)
1 5
2 6
3 9
4 10
5 11
6 12
7 13
8 14
9 16
10 17
11 18
12 19
13 20
14 21
15 23
16 24
17 25
18 26
19 27
20 28
21 29
22 30
23 31
24 32
25 33
26 34
27 35
28 36
29 37
30 38
31 39
32 40
33 41
34 42
35 45
36 46
37 47
38 48
39 49
40 50
41 51
42 52
43 53
44 54
45 55
46 56
47 57
48 58
49 59
50 60
51 61
52 62
53 63
54 64
55 65
56 66
57 67
58 68
59 69
60 70
61 71
62 72
63 73
64 74
65 75

List of values

[5, 6, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75]

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

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