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.

A231227 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

Table of values

n a(n)
1 1
2 2
3 2
4 3
5 4
6 3
7 6
8 8
9 8
10 6
11 11
12 17
13 21
14 17
15 11
16 22
17 45
18 54
19 54
20 45
21 22
22 43
23 103
24 185
25 182
26 185
27 103
28 43
29 86
30 264
31 552
32 812
33 812
34 552
35 264
36 86
37 171
38 676
39 1799
40 2962
41 4298
42 2962
43 1799
44 676
45 171
46 342
47 1724
48 5900
49 12179
50 19935
51 19935
52 12179
53 5900
54 1724
55 342
56 683
57 4501

List of values

[1, 2, 2, 3, 4, 3, 6, 8, 8, 6, 11, 17, 21, 17, 11, 22, 45, 54, 54, 45, 22, 43, 103, 185, 182, 185, 103, 43, 86, 264, 552, 812, 812, 552, 264, 86, 171, 676, 1799, 2962, 4298, 2962, 1799, 676, 171, 342, 1724, 5900, 12179, 19935, 19935, 12179, 5900, 1724, 342, 683, 4501]