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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.

A295275 T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s.

Table of values

n a(n)
1 2
2 4
3 4
4 7
5 11
6 7
7 13
8 33
9 33
10 13
11 24
12 98
13 164
14 98
15 24
16 44
17 291
18 811
19 811
20 291
21 44
22 81
23 865
24 4035
25 6659
26 4035
27 865
28 81
29 149
30 2570
31 19997
32 54773
33 54773
34 19997
35 2570
36 149
37 274
38 7637
39 99245
40 449827
41 748740
42 449827
43 99245
44 7637
45 274
46 504
47 22693
48 492401
49 3697742

List of values

[2, 4, 4, 7, 11, 7, 13, 33, 33, 13, 24, 98, 164, 98, 24, 44, 291, 811, 811, 291, 44, 81, 865, 4035, 6659, 4035, 865, 81, 149, 2570, 19997, 54773, 54773, 19997, 2570, 149, 274, 7637, 99245, 449827, 748740, 449827, 99245, 7637, 274, 504, 22693, 492401, 3697742]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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