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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.

A274017 Number of n-bead binary necklaces (no turning over allowed) that avoid the subsequence 110.

Table of values

n a(n)
0 1
1 2
2 3
3 3
4 4
5 4
6 6
7 6
8 9
9 11
10 16
11 20
12 32
13 42
14 65
15 95
16 144
17 212
18 330
19 494
20 767
21 1171
22 1812
23 2788
24 4342
25 6714
26 10463
27 16275
28 25416
29 39652
30 62076
31 97110
32 152289
33 238839
34 375168
35 589528
36 927556
37 1459962
38 2300349
39 3626243
40 5721046
41 9030452
42 14264310
43 22542398
44 35646313
45 56393863
46 89264836
47 141358276
48 223959712

List of values

[1, 2, 3, 3, 4, 4, 6, 6, 9, 11, 16, 20, 32, 42, 65, 95, 144, 212, 330, 494, 767, 1171, 1812, 2788, 4342, 6714, 10463, 16275, 25416, 39652, 62076, 97110, 152289, 238839, 375168, 589528, 927556, 1459962, 2300349, 3626243, 5721046, 9030452, 14264310, 22542398, 35646313, 56393863, 89264836, 141358276, 223959712]

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

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