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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.

A232369 Number of n X n 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.

Table of values

n a(n)
1 1
2 14
3 586
4 63744
5 27133338
6 47301712998
7 319646954776850
8 8418146420087467712
9 876192348419528567402450

List of values

[1, 14, 586, 63744, 27133338, 47301712998, 319646954776850, 8418146420087467712, 876192348419528567402450]

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

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