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.

A093367 Number of n-bead necklaces using exactly three colors with no adjacent beads having the same color.

Table of values

n a(n)
1 0
2 0
3 2
4 3
5 6
6 11
7 18
8 33
9 58
10 105
11 186
12 349
13 630
14 1179
15 2190
16 4113
17 7710
18 14599
19 27594
20 52485
21 99878
22 190743
23 364722
24 699249
25 1342182
26 2581425
27 4971066
28 9587577
29 18512790
30 35792565
31 69273666
32 134219793
33 260301174
34 505294125
35 981706830
36 1908881897
37 3714566310

List of values

[0, 0, 2, 3, 6, 11, 18, 33, 58, 105, 186, 349, 630, 1179, 2190, 4113, 7710, 14599, 27594, 52485, 99878, 190743, 364722, 699249, 1342182, 2581425, 4971066, 9587577, 18512790, 35792565, 69273666, 134219793, 260301174, 505294125, 981706830, 1908881897, 3714566310]

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

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