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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.

A198910 Number of nX4 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

n a(n)
1 5
2 500
3 269940
4 319608038
5 481871809749
6 769126451071174
7 1243368053336112649
8 2015791720035206825303
9 3270193421121063659774745
10 5305976942994216714747844079
11 8609380449975858170849466245738

List of values

[5, 500, 269940, 319608038, 481871809749, 769126451071174, 1243368053336112649, 2015791720035206825303, 3270193421121063659774745, 5305976942994216714747844079, 8609380449975858170849466245738]

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

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