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.

A371726 Number of Dyck paths of semilength n such that neighboring peaks differ in height by at most one and first and last peak are at height one.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 4
6 8
7 17
8 39
9 93
10 227
11 567
12 1447
13 3760
14 9917
15 26492
16 71567
17 195256
18 537397
19 1490614
20 4163508
21 11702411
22 33078992
23 93986117
24 268294604
25 769171970
26 2213834911
27 6395017291
28 18534987580
29 53887644375
30 157121564325
31 459351495858
32 1346290327899

List of values

[1, 1, 1, 1, 2, 4, 8, 17, 39, 93, 227, 567, 1447, 3760, 9917, 26492, 71567, 195256, 537397, 1490614, 4163508, 11702411, 33078992, 93986117, 268294604, 769171970, 2213834911, 6395017291, 18534987580, 53887644375, 157121564325, 459351495858, 1346290327899]

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

Content is available under The OEIS End-User License Agreement.