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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.

A186166 1/4 the number of n X 7 0..3 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

n a(n)
1 40
2 99933
3 87054174
4 95752776009
5 96951738076992
6 101554003879403823

List of values

[40, 99933, 87054174, 95752776009, 96951738076992, 101554003879403823]

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

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