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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.

A231663 T(n,k)=Number of nXk 0..2 arrays with no element less than a strict majority of its horizontal, vertical and antidiagonal neighbors.

Table of values

n a(n)
1 3
2 3
3 3
4 9
5 15
6 9
7 22
8 93
9 93
10 22
11 51
12 458
13 1197
14 458
15 51
16 121
17 2163
18 13434
19 13434
20 2163
21 121
22 292
23 10789
24 144465
25 345519
26 144465
27 10789
28 292
29 704
30 53813
31 1607589
32 8300390
33 8300390
34 1607589
35 53813
36 704
37 1691
38 265397
39 17962078
40 206363144
41 434469343

List of values

[3, 3, 3, 9, 15, 9, 22, 93, 93, 22, 51, 458, 1197, 458, 51, 121, 2163, 13434, 13434, 2163, 121, 292, 10789, 144465, 345519, 144465, 10789, 292, 704, 53813, 1607589, 8300390, 8300390, 1607589, 53813, 704, 1691, 265397, 17962078, 206363144, 434469343]

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

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