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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.

A175354 Numbers m such that reverse concatenations of divisors of m are nonprimes.

Table of values

n a(n)
1 1
2 2
3 5
4 6
5 8
6 9
7 10
8 11
9 12
10 14
11 15
12 16
13 17
14 18
15 20
16 21
17 22
18 23
19 24
20 26
21 27
22 28
23 29
24 30
25 32
26 33
27 34
28 35
29 36
30 37
31 38
32 40
33 41
34 42
35 44
36 45
37 46
38 47
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
66 76
67 77
68 78
69 79
70 80
71 81

List of values

[1, 2, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 44, 45, 46, 47, 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, 76, 77, 78, 79, 80, 81]

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

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