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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.

A231651 T(n,k)=Number of nXk 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors.

Table of values

n a(n)
1 3
2 3
3 3
4 9
5 35
6 9
7 22
8 104
9 104
10 22
11 51
12 341
13 920
14 341
15 51
16 121
17 1189
18 7682
19 7682
20 1189
21 121
22 292
23 4040
24 61574
25 137961
26 61574
27 4040
28 292
29 704
30 13560
31 490760
32 2412274
33 2412274
34 490760
35 13560
36 704
37 1691
38 45803
39 3929027
40 42882766
41 96014413
42 42882766

List of values

[3, 3, 3, 9, 35, 9, 22, 104, 104, 22, 51, 341, 920, 341, 51, 121, 1189, 7682, 7682, 1189, 121, 292, 4040, 61574, 137961, 61574, 4040, 292, 704, 13560, 490760, 2412274, 2412274, 490760, 13560, 704, 1691, 45803, 3929027, 42882766, 96014413, 42882766]

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

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