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.

A093688 Numbers m such that all divisors of m, excluding the divisor 1, have an even number of 1's in their binary expansions.

Table of values

n a(n)
1 1
2 3
3 5
4 9
5 15
6 17
7 23
8 27
9 29
10 43
11 45
12 51
13 53
14 71
15 83
16 85
17 89
18 101
19 113
20 129
21 135
22 139
23 149
24 153
25 159
26 163
27 197
28 215
29 249
30 255
31 257
32 263
33 267
34 269
35 277
36 281
37 293
38 303
39 311
40 317
41 337
42 347
43 349
44 353
45 359
46 373
47 383
48 387
49 389
50 401
51 417
52 447
53 449
54 459
55 461
56 467
57 479

List of values

[1, 3, 5, 9, 15, 17, 23, 27, 29, 43, 45, 51, 53, 71, 83, 85, 89, 101, 113, 129, 135, 139, 149, 153, 159, 163, 197, 215, 249, 255, 257, 263, 267, 269, 277, 281, 293, 303, 311, 317, 337, 347, 349, 353, 359, 373, 383, 387, 389, 401, 417, 447, 449, 459, 461, 467, 479]

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

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