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.

A023432 Number of Dyck n-paths with ascents and descents of length equal to 1 (mod 3).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 4
6 7
7 12
8 22
9 42
10 80
11 152
12 292
13 568
14 1112
15 2185
16 4313
17 8557
18 17050
19 34089
20 68370
21 137542
22 277475
23 561185
24 1137595
25 2311014
26 4704235
27 9593662
28 19598920
29 40103635
30 82185653
31 168666493
32 346613232
33 713200114
34 1469254621
35 3030218948
36 6256281188

List of values

[1, 1, 1, 1, 2, 4, 7, 12, 22, 42, 80, 152, 292, 568, 1112, 2185, 4313, 8557, 17050, 34089, 68370, 137542, 277475, 561185, 1137595, 2311014, 4704235, 9593662, 19598920, 40103635, 82185653, 168666493, 346613232, 713200114, 1469254621, 3030218948, 6256281188]