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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.

A185833 Half the number of nX7 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

n a(n)
1 8
2 421
3 5004
4 54223
5 649826
6 7678409
7 91052720
8 1073661088
9 12644950311
10 149729950026
11 1765937206744
12 20858521172073
13 246298874943372
14 2908556504972388
15 34344854423802299
16 405576876056939440

List of values

[8, 421, 5004, 54223, 649826, 7678409, 91052720, 1073661088, 12644950311, 149729950026, 1765937206744, 20858521172073, 246298874943372, 2908556504972388, 34344854423802299, 405576876056939440]

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

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