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.

A232584 Number of (n+1)X(3+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.

Table of values

n a(n)
1 2
2 12
3 42
4 122
5 332
6 882
7 2322
8 6092
9 15962
10 41802
11 109452
12 286562
13 750242
14 1964172
15 5142282
16 13462682
17 35245772
18 92274642
19 241578162
20 632459852
21 1655801402
22 4334944362
23 11349031692
24 29712150722
25 77787420482
26 203650110732

List of values

[2, 12, 42, 122, 332, 882, 2322, 6092, 15962, 41802, 109452, 286562, 750242, 1964172, 5142282, 13462682, 35245772, 92274642, 241578162, 632459852, 1655801402, 4334944362, 11349031692, 29712150722, 77787420482, 203650110732]