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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.

A265457 Number of nX7 0..n+7-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Table of values

n a(n)
1 9358
2 5710302
3 4148236142
4 3073046007824
5 2268041942592142
6 1653688201339124766
7 1191337567990711362900
8 848423104474986244064166
9 598271406157938091938371830
10 418189967455232632823299204488

List of values

[9358, 5710302, 4148236142, 3073046007824, 2268041942592142, 1653688201339124766, 1191337567990711362900, 848423104474986244064166, 598271406157938091938371830, 418189967455232632823299204488]

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

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