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.

A260523 Numbers n such that (sum of digits of n) + (product of digits of n) is semiprime.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 14
6 17
7 24
8 28
9 33
10 38
11 39
12 40
13 41
14 42
15 46
16 47
17 49
18 55
19 60
20 64
21 67
22 68
23 69
24 71
25 74
26 76
27 82
28 83
29 86
30 90
31 93
32 94
33 96
34 103
35 105
36 108
37 109
38 111
39 112
40 114
41 116
42 121
43 122
44 124
45 126
46 130
47 141
48 142
49 144
50 146
51 150
52 161
53 162
54 164
55 166
56 180
57 190
58 202
59 204
60 207

List of values

[2, 3, 5, 7, 14, 17, 24, 28, 33, 38, 39, 40, 41, 42, 46, 47, 49, 55, 60, 64, 67, 68, 69, 71, 74, 76, 82, 83, 86, 90, 93, 94, 96, 103, 105, 108, 109, 111, 112, 114, 116, 121, 122, 124, 126, 130, 141, 142, 144, 146, 150, 161, 162, 164, 166, 180, 190, 202, 204, 207]

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

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