A284106 Number of n X n 0..1 arrays with the number of 1's king-move adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

1, 4, 25, 5896, 905327, 3514396333, 12336109217951, 635264284970617848, 46214926085757662096414

Offset: 1

Author

R. H. Hardin, Mar 20 2017

Keywords

• nonn

Comments

Diagonal of A284113.

Examples

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

Crossrefs

Cf. A284113.