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.

A143282 Number of binary words of length n containing at least one subword 1001 and no subwords 10^{i}1 with i<2.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 2
6 3
7 5
8 9
9 15
10 24
11 38
12 60
13 94
14 146
15 225
16 345
17 527
18 802
19 1216
20 1838
21 2771
22 4168
23 6256
24 9372
25 14016
26 20929
27 31208
28 46476
29 69133
30 102726
31 152494
32 226171
33 335169
34 496320
35 734440
36 1086102
37 1605187
38 2371049
39 3500522
40 5165573
41 7619251

List of values

[0, 0, 0, 0, 1, 2, 3, 5, 9, 15, 24, 38, 60, 94, 146, 225, 345, 527, 802, 1216, 1838, 2771, 4168, 6256, 9372, 14016, 20929, 31208, 46476, 69133, 102726, 152494, 226171, 335169, 496320, 734440, 1086102, 1605187, 2371049, 3500522, 5165573, 7619251]

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

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