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.

A175786 Numbers n such that the number of prime divisors of n (counted with multiplicity) is not a divisor of phi(n).

Table of values

n a(n)
1 8
2 12
3 20
4 30
5 32
6 44
7 48
8 50
9 54
10 64
11 66
12 68
13 72
14 75
15 80
16 81
17 92
18 96
19 102
20 108
21 110
22 112
23 116
24 120
25 125
26 128
27 138
28 160
29 162
30 164
31 165
32 168
33 170
34 174
35 180
36 188
37 192
38 208
39 212
40 230
41 236
42 240
43 242
44 243
45 246
46 252
47 255
48 270
49 272
50 275
51 280
52 282
53 284
54 288
55 290
56 304

List of values

[8, 12, 20, 30, 32, 44, 48, 50, 54, 64, 66, 68, 72, 75, 80, 81, 92, 96, 102, 108, 110, 112, 116, 120, 125, 128, 138, 160, 162, 164, 165, 168, 170, 174, 180, 188, 192, 208, 212, 230, 236, 240, 242, 243, 246, 252, 255, 270, 272, 275, 280, 282, 284, 288, 290, 304]

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

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