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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.

A198903 Number of n X 5 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

n a(n)
1 15
2 4801
3 2125425
4 948656912
5 423503301834
6 189062985604305
7 84402688527136201
8 37679579867128064832
9 16821155393975907014458
10 7509406150309683843851949
11 3352396396661126098060061297

List of values

[15, 4801, 2125425, 948656912, 423503301834, 189062985604305, 84402688527136201, 37679579867128064832, 16821155393975907014458, 7509406150309683843851949, 3352396396661126098060061297]

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

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