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.

A189773 Number of n X n binary arrays without the pattern 1 0 0 1 diagonally, vertically or horizontally.

Original entry on oeis.org

2, 16, 512, 37976, 7767740, 3848548036, 5404382625660, 19742364192283882, 203905576411742503606, 5585800755853929115668714
Offset: 1

Views

Author

R. H. Hardin Apr 27 2011

Keywords

Comments

Diagonal of A189779

Examples

			Some solutions for 5X5
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..1..0..0....0..0..0..0..1....0..0..1..0..0....0..0..0..0..0
..1..1..0..1..0....0..1..0..1..0....0..0..1..1..1....0..1..0..1..0
..1..0..1..0..1....1..0..1..0..1....0..1..0..0..0....1..1..1..0..0
..1..1..0..1..1....1..0..1..0..0....1..1..1..1..0....1..0..0..0..1

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

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