A184206 Number of (n+1)X9 binary arrays with no 2X2 subblock containing fewer than two 1s.

31707, 4556371, 518574936, 64377477751, 7795714368919, 952294826074262, 116023864377980183, 14148460147460008963, 1724850427268614620086, 210297145807804211632731, 25639101187522824504622401

Offset: 1

Author

R. H. Hardin Jan 10 2011

Keywords

• nonn

Comments

Column 8 of A184207

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200