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.

A221295 Equals two maps: number of 7Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 7Xn array.

Table of values

n a(n)
1 1
2 1081
3 119972
4 22931365
5 4129628435
6 618825190371

List of values

[1, 1081, 119972, 22931365, 4129628435, 618825190371]

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

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