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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.

A220585 Equals one maps: number of 7Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 7Xn array.

Table of values

n a(n)
1 1
2 8192
3 22775
4 26616961
5 1120269376
6 166807007000
7 12835487766480

List of values

[1, 8192, 22775, 26616961, 1120269376, 166807007000, 12835487766480]

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

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