A293101 Number of 2 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 0, 9, 42, 150, 596, 2220, 8376, 31959, 121768, 465365, 1784742, 6865278, 26474028, 102325886, 396332796, 1538015240, 5978805044, 23278677150, 90767915948, 354389747119, 1385333740384, 5421345875519, 21237273165782, 83270840712919

Offset: 1

Author

R. H. Hardin, Sep 30 2017

Keywords

• nonn

Comments

Row 2 of A293100.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A293100.