cp's OEIS Frontend

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.

A268897 Number of n X n 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 36
3 1584
4 118584
5 17194680
6 5344944120
7 3679171151832
8 5729028666080112
9 20420870331077074152
10 167959998252207918469944
11 3205098856567970748329302728
12 142456755446316393140675874983544

List of values

[0, 36, 1584, 118584, 17194680, 5344944120, 3679171151832, 5729028666080112, 20420870331077074152, 167959998252207918469944, 3205098856567970748329302728, 142456755446316393140675874983544]

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

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