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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.

A344258 Integers m for which F (mod m) does not have rotational symmetry although F (mod k) does have rotational symmetry for all factors k of m.

Table of values

n a(n)
1 4
2 11
3 15
4 19
5 21
6 29
7 31
8 35
9 39
10 51
11 59
12 69
13 71
14 79
15 91
16 101
17 111
18 115
19 119
20 131
21 139
22 141
23 151
24 159
25 179
26 181
27 183
28 191
29 199
30 205
31 211
32 215
33 219
34 229
35 235
36 239
37 251
38 259
39 267
40 271
41 287
42 291
43 299
44 301
45 309
46 311
47 327
48 329
49 331
50 335
51 339
52 349
53 359
54 371
55 379
56 381

List of values

[4, 11, 15, 19, 21, 29, 31, 35, 39, 51, 59, 69, 71, 79, 91, 101, 111, 115, 119, 131, 139, 141, 151, 159, 179, 181, 183, 191, 199, 205, 211, 215, 219, 229, 235, 239, 251, 259, 267, 271, 287, 291, 299, 301, 309, 311, 327, 329, 331, 335, 339, 349, 359, 371, 379, 381]

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

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