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.

A228436 Odd n such that n*d are both odious (A000069) or both evil (A001969) for every divisor d of n.

Table of values

n a(n)
1 1
2 3
3 7
4 11
5 15
6 19
7 31
8 41
9 53
10 59
11 63
12 67
13 79
14 83
15 91
16 97
17 103
18 105
19 117
20 127
21 131
22 141
23 157
24 167
25 173
26 179
27 181
28 185
29 193
30 217
31 219
32 223
33 227
34 229
35 237
36 239
37 251
38 255
39 269
40 271
41 277
42 281
43 283
44 291
45 293
46 303
47 307
48 311
49 313
50 317
51 337
52 347
53 351
54 359
55 377

List of values

[1, 3, 7, 11, 15, 19, 31, 41, 53, 59, 63, 67, 79, 83, 91, 97, 103, 105, 117, 127, 131, 141, 157, 167, 173, 179, 181, 185, 193, 217, 219, 223, 227, 229, 237, 239, 251, 255, 269, 271, 277, 281, 283, 291, 293, 303, 307, 311, 313, 317, 337, 347, 351, 359, 377]