A185520 Number of (n+1)X9 0..2 arrays with every 2X2 subblock singular.

841449, 853020411, 119752453041, 56140705014995, 12721664424927033, 4536327635584899147, 1241739109392066416737, 401495654334865659721795, 118095161592668358071069961, 36895636527963491594862394779

Offset: 1

Author

R. H. Hardin Jan 29 2011

Keywords

• nonn

Comments

Column 8 of A185521

Examples

			Some solutions for 3X9
..0..0..0..0..0..0..2..0..0....0..0..0..0..2..0..0..1..1
..0..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0..0
..0..0..0..0..0..2..0..0..0....0..0..1..0..0..0..1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..72