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.

A221294 Equals two maps: number of 6Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 6Xn array.

Table of values

n a(n)
1 1
2 351
3 19996
4 1686304
5 143511784
6 10344276279

List of values

[1, 351, 19996, 1686304, 143511784, 10344276279]

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

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