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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.

A221065 Sum of neighbor maps: number of n X n binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 n X n array.

Table of values

n a(n)
1 2
2 8
3 512
4 65536
5 17530176
6 68719476736
7 562949953421312

List of values

[2, 8, 512, 65536, 17530176, 68719476736, 562949953421312]

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

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