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.

A091617 Number of compositions (ordered partitions) of n such that some part is repeated consecutively 3 times and no part is repeated consecutively more than 3 times.

Table of values

n a(n)
3 1
4 0
5 2
6 5
7 11
8 22
9 48
10 105
11 223
12 468
13 979
14 2037
15 4224
16 8710
17 17906
18 36693
19 74973
20 152795
21 310669
22 630353
23 1276544
24 2580614
25 5208522
26 10496954
27 21126102
28 42464498
29 85255651
30 170980512
31 342553389
32 685641724
33 1371134291
34 2739685107
35 5469923466
36 10912945300

List of values

[1, 0, 2, 5, 11, 22, 48, 105, 223, 468, 979, 2037, 4224, 8710, 17906, 36693, 74973, 152795, 310669, 630353, 1276544, 2580614, 5208522, 10496954, 21126102, 42464498, 85255651, 170980512, 342553389, 685641724, 1371134291, 2739685107, 5469923466, 10912945300]

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

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