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.

A288542 Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals three.

Table of values

n a(n)
3 1
4 0
5 0
6 0
7 4
8 29
9 90
10 188
11 345
12 825
13 3089
14 13450
15 54526
16 198846
17 668430
18 2155731
19 6963768
20 23265733
21 81163559
22 292726843
23 1073684818
24 3953422052
25 14517741411
26 53096290021
27 193719344526
28 706944953011
29 2586796240687
30 9505841335788
31 35102295346482

List of values

[1, 0, 0, 0, 4, 29, 90, 188, 345, 825, 3089, 13450, 54526, 198846, 668430, 2155731, 6963768, 23265733, 81163559, 292726843, 1073684818, 3953422052, 14517741411, 53096290021, 193719344526, 706944953011, 2586796240687, 9505841335788, 35102295346482]

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

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