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.

A191647 Numbers n with property that the concatenation of their anti-divisors is a prime.

Table of values

n a(n)
1 3
2 4
3 5
4 10
5 14
6 16
7 40
8 46
9 100
10 145
11 149
12 251
13 340
14 373
15 406
16 424
17 439
18 466
19 539
20 556
21 571
22 575
23 617
24 619
25 628
26 629
27 655
28 676
29 689
30 724
31 760
32 779
33 794
34 899
35 901
36 941
37 970
38 989
39 1019
40 1055
41 1070
42 1076
43 1183
44 1213
45 1226
46 1231
47 1258
48 1270
49 1285
50 1331
51 1340

List of values

[3, 4, 5, 10, 14, 16, 40, 46, 100, 145, 149, 251, 340, 373, 406, 424, 439, 466, 539, 556, 571, 575, 617, 619, 628, 629, 655, 676, 689, 724, 760, 779, 794, 899, 901, 941, 970, 989, 1019, 1055, 1070, 1076, 1183, 1213, 1226, 1231, 1258, 1270, 1285, 1331, 1340]