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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.

A131930 Numbers k such that the decimal representation of k contains at least one prime factor of k.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 11
6 12
7 13
8 15
9 17
10 19
11 20
12 22
13 23
14 24
15 25
16 26
17 28
18 29
19 30
20 31
21 32
22 33
23 35
24 36
25 37
26 39
27 41
28 42
29 43
30 45
31 47
32 50
33 52
34 53
35 55
36 59
37 61
38 62
39 63
40 65
41 67
42 70
43 71
44 72
45 73
46 75
47 77
48 79
49 82
50 83
51 85
52 89
53 92
54 93
55 95
56 97
57 101
58 102
59 103
60 105
61 107
62 109
63 110
64 112
65 113
66 115
67 120

List of values

[2, 3, 5, 7, 11, 12, 13, 15, 17, 19, 20, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 41, 42, 43, 45, 47, 50, 52, 53, 55, 59, 61, 62, 63, 65, 67, 70, 71, 72, 73, 75, 77, 79, 82, 83, 85, 89, 92, 93, 95, 97, 101, 102, 103, 105, 107, 109, 110, 112, 113, 115, 120]

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

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