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.

A232582 Number of (n+1) X (1+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 0
2 2
3 4
4 6
5 10
6 18
7 32
8 56
9 98
10 172
11 302
12 530
13 930
14 1632
15 2864
16 5026
17 8820
18 15478
19 27162
20 47666
21 83648
22 146792
23 257602
24 452060
25 793310
26 1392162
27 2443074
28 4287296
29 7523680
30 13203138
31 23169892
32 40660326
33 71353898
34 125217362
35 219741152
36 385618840

List of values

[0, 2, 4, 6, 10, 18, 32, 56, 98, 172, 302, 530, 930, 1632, 2864, 5026, 8820, 15478, 27162, 47666, 83648, 146792, 257602, 452060, 793310, 1392162, 2443074, 4287296, 7523680, 13203138, 23169892, 40660326, 71353898, 125217362, 219741152, 385618840]