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.

A208050 T(n,k)=Number of nXk 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 2
7 5
8 8
9 8
10 5
11 14
12 32
13 44
14 32
15 14
16 41
17 128
18 244
19 244
20 128
21 41
22 122
23 512
24 1356
25 1904
26 1356
27 512
28 122
29 365
30 2048
31 7540
32 14976
33 14976
34 7540
35 2048
36 365
37 1094
38 8192
39 41932
40 118096
41 168096
42 118096
43 41932
44 8192
45 1094
46 3281
47 32768
48 233204
49 931968

List of values

[1, 1, 1, 2, 2, 2, 5, 8, 8, 5, 14, 32, 44, 32, 14, 41, 128, 244, 244, 128, 41, 122, 512, 1356, 1904, 1356, 512, 122, 365, 2048, 7540, 14976, 14976, 7540, 2048, 365, 1094, 8192, 41932, 118096, 168096, 118096, 41932, 8192, 1094, 3281, 32768, 233204, 931968]