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.

A213984 Number of n X n 0..2 matrices whose square is also a 0..2 matrix.

Original entry on oeis.org

2, 24, 1003, 120133, 35799856, 24651985100
Offset: 1

Views

Author

R. H. Hardin Jun 30 2012

Keywords

Comments

Column 2 of A213990

Examples

			Some solutions for n=3
..0..1..1....1..0..1....0..2..0....0..1..0....1..1..2....0..0..0....0..1..2
..0..0..2....0..0..2....0..0..0....0..1..2....0..0..0....0..0..0....1..0..0
..0..0..0....0..1..0....0..0..0....0..0..0....0..0..0....0..0..0....0..1..0

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

Content is available under The OEIS End-User License Agreement.