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.

A104179 Primes that are either single-digit primes or a concatenation of two earlier terms.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 23
6 37
7 53
8 73
9 223
10 233
11 337
12 353
13 373
14 523
15 733
16 773
17 2237
18 2333
19 3373
20 3533
21 3733
22 5233
23 5237
24 5323
25 7333
26 7523
27 23333
28 23773
29 25237
30 32237
31 33533
32 33773
33 35323
34 35353
35 37223
36 37337
37 52237
38 53233
39 53353
40 53773
41 73523
42 75323
43 77323

List of values

[2, 3, 5, 7, 23, 37, 53, 73, 223, 233, 337, 353, 373, 523, 733, 773, 2237, 2333, 3373, 3533, 3733, 5233, 5237, 5323, 7333, 7523, 23333, 23773, 25237, 32237, 33533, 33773, 35323, 35353, 37223, 37337, 52237, 53233, 53353, 53773, 73523, 75323, 77323]

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

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