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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.

A220578 Equals one maps: number of nX7 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 nX7 array.

Table of values

n a(n)
1 64
2 5240
3 436288
4 33180533
5 2449921734
6 178051989526
7 12835487766480

List of values

[64, 5240, 436288, 33180533, 2449921734, 178051989526, 12835487766480]

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

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