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.

A209191 Numbers n such that digital root of n equals smallest prime factor of n.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 20
6 21
7 38
8 39
9 56
10 57
11 74
12 75
13 92
14 93
15 95
16 110
17 111
18 128
19 129
20 133
21 146
22 147
23 164
24 165
25 182
26 183
27 185
28 200
29 201
30 218
31 219
32 236
33 237
34 254
35 255
36 259
37 272
38 273
39 275
40 290
41 291
42 308
43 309
44 326
45 327
46 344
47 345
48 362
49 363
50 365
51 380
52 381
53 398

List of values

[2, 3, 5, 7, 20, 21, 38, 39, 56, 57, 74, 75, 92, 93, 95, 110, 111, 128, 129, 133, 146, 147, 164, 165, 182, 183, 185, 200, 201, 218, 219, 236, 237, 254, 255, 259, 272, 273, 275, 290, 291, 308, 309, 326, 327, 344, 345, 362, 363, 365, 380, 381, 398]