A184678 Number of (n+1)X(n+1) binary arrays with every 2X2 subblock singular.

10, 128, 3360, 221968, 31817360, 10876933264, 8344809419152, 14901599172048528, 60581954550463205264, 567946901826257621019792, 12186523252504462055625831824, 601019440996497914601529636314768

Offset: 1

Author

R. H. Hardin Jan 19 2011

Keywords

• nonn

Comments

Diagonal of A184686

Examples

			Some solutions for 3X3
..1..1..0....0..0..0....0..0..0....0..0..0....0..0..0....1..1..0....1..0..1
..0..0..0....0..0..1....0..0..0....1..1..1....0..1..0....0..0..0....0..0..1
..1..1..1....1..0..0....1..0..0....1..1..1....0..0..0....0..1..0....0..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..15