A284215 Number of n X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

1, 6, 70, 6511, 2417194, 3945536189, 26772321109067, 749608559151363940, 85781667864838421304454, 39910247433142071128719168435, 75224282551539452957156354090109083

Offset: 1

Author

R. H. Hardin, Mar 23 2017

Keywords

• nonn

Comments

Diagonal of A284222.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..12

Crossrefs

Cf. A284222.