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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.

A284192 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Table of values

n a(n)
1 1
2 4
3 43
4 5268
5 1488503
6 3083244672
7 18564422929880
8 573011303756296687
9 62959447148443427630088

List of values

[1, 4, 43, 5268, 1488503, 3083244672, 18564422929880, 573011303756296687, 62959447148443427630088]

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

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