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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.

A184367 1/3 the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.

Table of values

n a(n)
1 21
2 2755
3 2167173
4 10378244309
5 301753233626727
6 53293289955084658949
7 57168347029530545962203193
8 372482322079037724494019844619359

List of values

[21, 2755, 2167173, 10378244309, 301753233626727, 53293289955084658949, 57168347029530545962203193, 372482322079037724494019844619359]

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

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