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.

A121610 Composite numbers that can be written as concatenation of two composite numbers in decimal representation.

Table of values

n a(n)
1 44
2 46
3 48
4 49
5 64
6 66
7 68
8 69
9 84
10 86
11 88
12 94
13 96
14 98
15 99
16 104
17 106
18 108
19 124
20 126
21 128
22 129
23 144
24 146
25 148
26 154
27 156
28 158
29 159
30 164
31 166
32 168
33 169
34 184
35 186
36 188
37 189
38 204
39 206
40 208
41 209
42 214
43 216
44 218
45 219
46 224
47 226
48 228
49 244
50 246
51 248
52 249
53 254
54 256
55 258

List of values

[44, 46, 48, 49, 64, 66, 68, 69, 84, 86, 88, 94, 96, 98, 99, 104, 106, 108, 124, 126, 128, 129, 144, 146, 148, 154, 156, 158, 159, 164, 166, 168, 169, 184, 186, 188, 189, 204, 206, 208, 209, 214, 216, 218, 219, 224, 226, 228, 244, 246, 248, 249, 254, 256, 258]

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

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