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.

A208772 Number of n-bead necklaces labeled with numbers 1..3 not allowing reversal, with no adjacent beads differing by more than 1.

Table of values

n a(n)
1 3
2 5
3 7
4 12
5 19
6 39
7 71
8 152
9 315
10 685
11 1479
12 3294
13 7283
14 16359
15 36791
16 83312
17 189123
18 431393
19 986247
20 2262308
21 5200851
22 11985863
23 27676615
24 64034954
25 148406243
26 344507805
27 800902879
28 1864502926
29 4346071603
30 10142619039
31 23696518919
32 55420734752
33 129742923475
34 304014655205
35 712985901943
36 1673486556648

List of values

[3, 5, 7, 12, 19, 39, 71, 152, 315, 685, 1479, 3294, 7283, 16359, 36791, 83312, 189123, 431393, 986247, 2262308, 5200851, 11985863, 27676615, 64034954, 148406243, 344507805, 800902879, 1864502926, 4346071603, 10142619039, 23696518919, 55420734752, 129742923475, 304014655205, 712985901943, 1673486556648]

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

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