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.

A115123 Number of imprimitive (periodic) bracelets (or necklaces) with n red and blue beads such that the beads switch colors when bracelet is turned over.

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 1
6 5
7 1
8 9
9 4
10 22
11 1
12 63
13 1
14 156
15 24
16 469
17 1
18 1532
19 1
20 4889
21 158
22 16546
23 1
24 57844
25 21
26 202061
27 1480
28 720533
29 1
30 2598406
31 1
32 9408469
33 16548
34 34350508
35 175
36 126167112
37 1
38 465200334
39 202063
40 1723346534
41 1
42 6409076632
43 1
44 23911272097
45 2594970
46 89495909410
47 1

List of values

[0, 1, 1, 2, 1, 5, 1, 9, 4, 22, 1, 63, 1, 156, 24, 469, 1, 1532, 1, 4889, 158, 16546, 1, 57844, 21, 202061, 1480, 720533, 1, 2598406, 1, 9408469, 16548, 34350508, 175, 126167112, 1, 465200334, 202063, 1723346534, 1, 6409076632, 1, 23911272097, 2594970, 89495909410, 1]