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.

A080470 a(n) = smallest composite number that is obtained by placing digits anywhere in n; a(n) = n if n is composite.

Table of values

n a(n)
1 10
2 12
3 30
4 4
5 15
6 6
7 27
8 8
9 9
10 10
11 110
12 12
13 123
14 14
15 15
16 16
17 117
18 18
19 119
20 20
21 21
22 22
23 123
24 24
25 25
26 26
27 27
28 28
29 129
30 30
31 231
32 32
33 33
34 34
35 35
36 36
37 237
38 38
39 39
40 40
41 141
42 42
43 143
44 44
45 45
46 46
47 147
48 48
49 49
50 50
51 51
52 52
53 153
54 54
55 55
56 56
57 57
58 58
59 159
60 60
61 161
62 62
63 63
64 64
65 65
66 66
67 267

List of values

[10, 12, 30, 4, 15, 6, 27, 8, 9, 10, 110, 12, 123, 14, 15, 16, 117, 18, 119, 20, 21, 22, 123, 24, 25, 26, 27, 28, 129, 30, 231, 32, 33, 34, 35, 36, 237, 38, 39, 40, 141, 42, 143, 44, 45, 46, 147, 48, 49, 50, 51, 52, 153, 54, 55, 56, 57, 58, 159, 60, 161, 62, 63, 64, 65, 66, 267]

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

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