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.

A197199 T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.

Table of values

n a(n)
1 1
2 2
3 2
4 3
5 5
6 3
7 4
8 9
9 9
10 4
11 6
12 20
13 25
14 20
15 6
16 9
17 41
18 75
19 75
20 41
21 9
22 13
23 85
24 213
25 314
26 213
27 85
28 13
29 19
30 178
31 621
32 1283
33 1283
34 621
35 178
36 19
37 28
38 369
39 1801
40 5311
41 7363
42 5311
43 1801
44 369
45 28
46 41
47 769
48 5219
49 21803
50 42664
51 42664
52 21803
53 5219
54 769
55 41
56 60
57 1600
58 15133
59 89640

List of values

[1, 2, 2, 3, 5, 3, 4, 9, 9, 4, 6, 20, 25, 20, 6, 9, 41, 75, 75, 41, 9, 13, 85, 213, 314, 213, 85, 13, 19, 178, 621, 1283, 1283, 621, 178, 19, 28, 369, 1801, 5311, 7363, 5311, 1801, 369, 28, 41, 769, 5219, 21803, 42664, 42664, 21803, 5219, 769, 41, 60, 1600, 15133, 89640]