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.

A007039 Number of cyclic binary n-bit strings with no alternating substring of length > 2.

Table of values

n a(n)
1 2
2 2
3 2
4 6
5 12
6 20
7 30
8 46
9 74
10 122
11 200
12 324
13 522
14 842
15 1362
16 2206
17 3572
18 5780
19 9350
20 15126
21 24474
22 39602
23 64080
24 103684
25 167762
26 271442
27 439202
28 710646
29 1149852
30 1860500
31 3010350
32 4870846
33 7881194
34 12752042
35 20633240
36 33385284
37 54018522
38 87403802
39 141422322

List of values

[2, 2, 2, 6, 12, 20, 30, 46, 74, 122, 200, 324, 522, 842, 1362, 2206, 3572, 5780, 9350, 15126, 24474, 39602, 64080, 103684, 167762, 271442, 439202, 710646, 1149852, 1860500, 3010350, 4870846, 7881194, 12752042, 20633240, 33385284, 54018522, 87403802, 141422322]

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

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