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.

A046423 Numbers requiring 3 steps to reach a prime under the prime factor concatenation procedure.

Table of values

n a(n)
1 25
2 35
3 56
4 62
5 69
6 72
7 76
8 85
9 90
10 100
11 114
12 125
13 138
14 143
15 152
16 189
17 213
18 221
19 238
20 250
21 259
22 260
23 270
24 275
25 278
26 303
27 318
28 333
29 364
30 366
31 369
32 390
33 403
34 441
35 448
36 454
37 469
38 470
39 473
40 485
41 507
42 512
43 519
44 522
45 529
46 559
47 560
48 572
49 588
50 591
51 624
52 629
53 648

List of values

[25, 35, 56, 62, 69, 72, 76, 85, 90, 100, 114, 125, 138, 143, 152, 189, 213, 221, 238, 250, 259, 260, 270, 275, 278, 303, 318, 333, 364, 366, 369, 390, 403, 441, 448, 454, 469, 470, 473, 485, 507, 512, 519, 522, 529, 559, 560, 572, 588, 591, 624, 629, 648]