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.

A110603 Numbers n whose base 5 representations, interpreted as base 10 integers, are semiprimes.

Table of values

n a(n)
1 4
2 5
3 9
4 11
5 12
6 18
7 19
8 31
9 36
10 37
11 38
12 43
13 44
14 46
15 47
16 48
17 51
18 52
19 53
20 58
21 59
22 61
23 76
24 77
25 78
26 84
27 86
28 88
29 94
30 96
31 103
32 106
33 108
34 112
35 128
36 131
37 146
38 147
39 148
40 151
41 156
42 159
43 161
44 168
45 171
46 172
47 177
48 178
49 181
50 184
51 194
52 196
53 198
54 208
55 212
56 218
57 223
58 226
59 227
60 228

List of values

[4, 5, 9, 11, 12, 18, 19, 31, 36, 37, 38, 43, 44, 46, 47, 48, 51, 52, 53, 58, 59, 61, 76, 77, 78, 84, 86, 88, 94, 96, 103, 106, 108, 112, 128, 131, 146, 147, 148, 151, 156, 159, 161, 168, 171, 172, 177, 178, 181, 184, 194, 196, 198, 208, 212, 218, 223, 226, 227, 228]

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

Content is available under The OEIS End-User License Agreement.