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.

A110605 Numbers n whose base 7 representations, interpreted as base 10 integers, are semiprimes.

Table of values

n a(n)
1 4
2 6
3 7
4 11
5 12
6 15
7 16
8 19
9 20
10 24
11 25
12 26
13 34
14 36
15 40
16 44
17 47
18 55
19 57
20 61
21 64
22 65
23 66
24 73
25 74
26 78
27 79
28 80
29 82
30 83
31 89
32 92
33 97
34 99
35 100
36 101
37 103
38 104
39 108
40 109
41 110
42 113
43 118
44 124
45 136
46 137
47 142
48 145
49 148
50 149
51 150
52 152
53 158
54 162
55 164
56 167
57 172
58 173
59 176
60 181
61 187

List of values

[4, 6, 7, 11, 12, 15, 16, 19, 20, 24, 25, 26, 34, 36, 40, 44, 47, 55, 57, 61, 64, 65, 66, 73, 74, 78, 79, 80, 82, 83, 89, 92, 97, 99, 100, 101, 103, 104, 108, 109, 110, 113, 118, 124, 136, 137, 142, 145, 148, 149, 150, 152, 158, 162, 164, 167, 172, 173, 176, 181, 187]

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

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