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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.

A231645 Number of n X 2 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 35
3 104
4 341
5 1189
6 4040
7 13560
8 45803
9 155131
10 524683
11 1773770
12 5998876
13 20290918
14 68629108
15 232120783
16 785115525
17 2655576210
18 8982247095
19 30381769982
20 102764504913
21 347595681724
22 1175726561166
23 3976846922803
24 13451535863780

List of values

[3, 35, 104, 341, 1189, 4040, 13560, 45803, 155131, 524683, 1773770, 5998876, 20290918, 68629108, 232120783, 785115525, 2655576210, 8982247095, 30381769982, 102764504913, 347595681724, 1175726561166, 3976846922803, 13451535863780]

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

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