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.

A196809 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 4,2,3,0,1 for x=0,1,2,3,4.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 3
9 3
10 1
11 1
12 7
13 16
14 7
15 1
16 1
17 17
18 37
19 37
20 17
21 1
22 1
23 41
24 120
25 193
26 120
27 41
28 1
29 1
30 99
31 420
32 1515
33 1515
34 420
35 99
36 1
37 1
38 239
39 1468
40 8719
41 19449
42 8719
43 1468
44 239
45 1
46 1
47 577
48 4801
49 52291
50 166682
51 166682
52 52291
53 4801
54 577
55 1
56 1
57 1393
58 15885
59 334317
60 1730105

List of values

[1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 7, 16, 7, 1, 1, 17, 37, 37, 17, 1, 1, 41, 120, 193, 120, 41, 1, 1, 99, 420, 1515, 1515, 420, 99, 1, 1, 239, 1468, 8719, 19449, 8719, 1468, 239, 1, 1, 577, 4801, 52291, 166682, 166682, 52291, 4801, 577, 1, 1, 1393, 15885, 334317, 1730105]