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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.

A228481 Number of nX7 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or antidiagonally.

Table of values

n a(n)
1 13
2 88
3 1181
4 13050
5 152373
6 1748684
7 20185842
8 232542935
9 2680777055
10 30897168815
11 356129525933
12 4104762592860
13 47311923541451
14 545321432832844
15 6285425006257311
16 72446383973495105
17 835023655383918595

List of values

[13, 88, 1181, 13050, 152373, 1748684, 20185842, 232542935, 2680777055, 30897168815, 356129525933, 4104762592860, 47311923541451, 545321432832844, 6285425006257311, 72446383973495105, 835023655383918595]

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

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