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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.

A289020 Number of Dyck paths having exactly one peak in each of the levels 1,...,n and no other peaks.

Table of values

n a(n)
0 1
1 1
2 2
3 10
4 92
5 1348
6 28808
7 845800
8 32664944
9 1605553552
10 97868465696
11 7245440815264
12 640359291096512
13 66598657958731840
14 8051483595083729024
15 1119653568781387712128
16 177465810459239319017216
17 31804047327185301634148608
18 6398867435594240638421950976

List of values

[1, 1, 2, 10, 92, 1348, 28808, 845800, 32664944, 1605553552, 97868465696, 7245440815264, 640359291096512, 66598657958731840, 8051483595083729024, 1119653568781387712128, 177465810459239319017216, 31804047327185301634148608, 6398867435594240638421950976]

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

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