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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.

A232287 Number of 7Xn 0..2 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors.

Table of values

n a(n)
1 2187
2 13560
3 17764558
4 8229274953
5 2527067273698
6 706877889324298
7 256322282485691293
8 98517778421264329607
9 35243173677566129081248
10 12065580271163853464002869
11 4200286091740243261372580372

List of values

[2187, 13560, 17764558, 8229274953, 2527067273698, 706877889324298, 256322282485691293, 98517778421264329607, 35243173677566129081248, 12065580271163853464002869, 4200286091740243261372580372]

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

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