A222321 Number of n X n 0..1 arrays with exactly floor(n X n/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order.

1, 0, 4, 52, 674, 38238, 2284728, 620488671, 174162198742, 206752746752932

Offset: 1

Author

R. H. Hardin Feb 15 2013

Keywords

• nonn

Comments

Diagonal of A222328

Examples

			Some solutions for n=4
..0..0..0..0....0..1..0..0....0..0..0..0....0..0..1..0....0..0..0..1
..1..0..0..0....1..0..0..0....0..0..0..0....1..1..1..1....0..0..0..1
..1..0..0..0....0..0..0..0....0..0..0..1....1..1..1..1....0..0..0..1
..0..0..0..0....0..0..0..0....0..0..1..1....1..1..1..1....0..0..0..1