A183434 Number of n X n binary arrays with every 1 having exactly one king-move neighbor equal to 1

1, 7, 29, 361, 10459, 413450, 37904950, 6750242518, 2166586326637, 1414165738392719, 1769976680392262392, 4242277623456129400305, 19897602588709306137305059, 179960590072630530132741409405

Offset

1,2

Comments

Diagonal of A183442

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions for 3X3
..0..1..0....0..0..0....1..1..0....0..1..0....0..1..1....0..0..1....1..0..0
..1..0..0....1..0..0....0..0..0....0..1..0....0..0..0....0..0..1....0..1..0
..0..0..0....0..1..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

Crossrefs

Sequence in context: A175208 A307954 A071918 * A120789 A135629 A122119

Adjacent sequences: A183431 A183432 A183433 * A183435 A183436 A183437

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved