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.

A263768 Number of necklaces with n beads colored white or red, where the number of white beads is odd and at least three and turning over is allowed.

Table of values

n a(n)
3 1
4 1
5 3
6 4
7 8
8 11
9 22
10 33
11 62
12 101
13 189
14 324
15 611
16 1087
17 2055
18 3770
19 7154
20 13363
21 25481
22 48174
23 92204
24 175791
25 337593
26 647325
27 1246862
28 2400841
29 4636389
30 8956059
31 17334800
32 33570815
33 65108061
34 126355335
35 245492243
36 477284181
37 928772649
38 1808538354
39 3524337979
40 6872209823

List of values

[1, 1, 3, 4, 8, 11, 22, 33, 62, 101, 189, 324, 611, 1087, 2055, 3770, 7154, 13363, 25481, 48174, 92204, 175791, 337593, 647325, 1246862, 2400841, 4636389, 8956059, 17334800, 33570815, 65108061, 126355335, 245492243, 477284181, 928772649, 1808538354, 3524337979, 6872209823]

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

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