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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.

A243121 Number of compositions of n in which the maximal multiplicity of parts equals 4.

Table of values

n a(n)
4 1
5 0
6 5
7 5
8 21
9 40
10 100
11 210
12 396
13 870
14 1790
15 3510
16 6681
17 13100
18 25320
19 47835
20 87126
21 166195
22 299375
23 542595
24 991036
25 1775935
26 3145270
27 5487805
28 9852046
29 17092310
30 29561070
31 50696690
32 88015196
33 150446590
34 256066280
35 428469220
36 727919426
37 1224816005
38 2043828145

List of values

[1, 0, 5, 5, 21, 40, 100, 210, 396, 870, 1790, 3510, 6681, 13100, 25320, 47835, 87126, 166195, 299375, 542595, 991036, 1775935, 3145270, 5487805, 9852046, 17092310, 29561070, 50696690, 88015196, 150446590, 256066280, 428469220, 727919426, 1224816005, 2043828145]

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

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