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.

A221293 Equals two maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 5Xn array.

Table of values

n a(n)
1 1
2 114
3 3332
4 123958
5 4983598
6 172905144
7 6138441061

List of values

[1, 114, 3332, 123958, 4983598, 172905144, 6138441061]

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

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