A284451 Number of n X 4 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.

2, 0, 250, 3384, 54248, 824052, 12957944, 203401448, 3209101642, 50702668880, 801990075576, 12692871462160, 200953195066764, 3182000912440584, 50388819126999402, 797940889459632096, 12635596604122356028

Offset: 1

Author

R. H. Hardin, Mar 27 2017

Keywords

• nonn

Comments

Column 4 of A284455.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..187

Crossrefs

Cf. A284455.