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.

A091618 Number of compositions (ordered partitions) of n such that some part is repeated consecutively 4 times and no part is repeated consecutively more than 4 times.

Table of values

n a(n)
4 1
5 0
6 2
7 4
8 10
9 22
10 46
11 101
12 218
13 466
14 991
15 2093
16 4405
17 9232
18 19288
19 40169
20 83416
21 172806
22 357170
23 736710
24 1516714
25 3117133
26 6396116
27 13105012
28 26814264
29 54795330
30 111842771
31 228030558
32 464439943
33 945029466
34 1921169854
35 3902239742
36 7919743405
37 16061152291

List of values

[1, 0, 2, 4, 10, 22, 46, 101, 218, 466, 991, 2093, 4405, 9232, 19288, 40169, 83416, 172806, 357170, 736710, 1516714, 3117133, 6396116, 13105012, 26814264, 54795330, 111842771, 228030558, 464439943, 945029466, 1921169854, 3902239742, 7919743405, 16061152291]

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

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