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.

A138193 Odd composite numbers n for which A137576((n-1)/2)-1 is divisible by phi(n).

Table of values

n a(n)
1 9
2 15
3 25
4 27
5 33
6 39
7 49
8 55
9 57
10 63
11 81
12 87
13 95
14 111
15 119
16 121
17 125
18 135
19 143
20 153
21 159
22 161
23 169
24 175
25 177
26 183
27 201
28 207
29 209
30 225
31 243
32 249
33 287
34 289
35 295
36 297
37 303
38 319
39 321
40 329
41 335
42 343
43 351
44 361
45 369
46 375
47 391
48 393
49 407
50 415
51 417
52 423
53 447
54 489
55 497

List of values

[9, 15, 25, 27, 33, 39, 49, 55, 57, 63, 81, 87, 95, 111, 119, 121, 125, 135, 143, 153, 159, 161, 169, 175, 177, 183, 201, 207, 209, 225, 243, 249, 287, 289, 295, 297, 303, 319, 321, 329, 335, 343, 351, 361, 369, 375, 391, 393, 407, 415, 417, 423, 447, 489, 497]