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.

A255665 Number of length n+5 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.

Table of values

n a(n)
1 4096
2 16384
3 64257
4 209412
5 564600
6 1324872
7 2816673
8 5555336
9 10323148
10 18270784
11 31047630
12 50967648
13 81218758
14 126125244
15 191474454
16 284921080
17 416484596
18 599158024
19 849649115
20 1189278300
21 1645061412
22 2251009232

List of values

[4096, 16384, 64257, 209412, 564600, 1324872, 2816673, 5555336, 10323148, 18270784, 31047630, 50967648, 81218758, 126125244, 191474454, 284921080, 416484596, 599158024, 849649115, 1189278300, 1645061412, 2251009232]