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.

Original entry on oeis.org

1, 114, 3332, 123958, 4983598, 172905144, 6138441061
Offset: 1

Views

Author

R. H. Hardin Jan 09 2013

Keywords

Comments

Row 5 of A221290

Examples

			Some solutions for n=3
..0..0..1....0..0..0....0..0..0....0..0..1....0..1..0....0..1..0....0..1..1
..0..0..0....0..1..0....0..0..1....1..0..0....1..0..1....0..0..0....1..0..1
..0..1..0....1..1..0....1..0..0....0..0..0....1..0..1....0..0..0....1..1..0
..0..1..1....1..0..0....0..1..1....1..1..0....1..0..1....1..0..1....0..1..1
..0..0..0....0..0..0....1..0..0....1..0..0....0..1..0....1..1..0....1..0..0