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.

A284771 T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 4
6 1
7 2
8 14
9 14
10 2
11 6
12 52
13 119
14 52
15 6
16 12
17 206
18 720
19 720
20 206
21 12
22 28
23 772
24 5637
25 10120
26 5637
27 772
28 28
29 56
30 2896
31 38792
32 145822
33 145822
34 38792
35 2896
36 56
37 119
38 10996
39 298003
40 2134812
41 4219759
42 2134812
43 298003
44 10996
45 119
46 236
47 41862
48 2180148

List of values

[0, 0, 0, 1, 4, 1, 2, 14, 14, 2, 6, 52, 119, 52, 6, 12, 206, 720, 720, 206, 12, 28, 772, 5637, 10120, 5637, 772, 28, 56, 2896, 38792, 145822, 145822, 38792, 2896, 56, 119, 10996, 298003, 2134812, 4219759, 2134812, 298003, 10996, 119, 236, 41862, 2180148]