A221337 T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two.

0, 2, 2, 0, 6, 0, 4, 20, 20, 4, 0, 68, 0, 68, 0, 8, 232, 790, 790, 232, 8, 0, 792, 0, 10704, 0, 792, 0, 16, 2704, 34042, 142792, 142792, 34042, 2704, 16, 0, 9232, 0, 1937900, 0, 1937900, 0, 9232, 0, 32, 31520, 1470618, 26264018

Offset: 1

Author

R. H. Hardin Jan 11 2013

Keywords

• nonn
• tabl

Comments

Table starts

..0....2.....0.......4......0.......8........0......16.....0.32

..2....6....20......68....232.....792.....2704....9232.31520

..0...20.....0.....790......0...34042........0.1470618

..4...68...790...10704.142792.1937900.26264018

..0..232.....0..142792......0

..8..792.34042.1937900

..0.2704.....0

.16.9232

..0

Examples

			Some solutions for n=3 k=4
..0..2..2..2....2..0..0..0....2..0..2..0....0..0..2..0....0..2..2..0
..2..0..0..0....2..2..2..0....0..0..2..0....2..2..0..0....2..2..0..0
..0..2..0..2....0..2..0..2....2..0..2..2....2..0..2..2....0..0..2..2
		

Crossrefs

Column 1 is A077957

Column 2 is A006012