A251071 Number of (7+1)X(n+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

3935721, 634161915, 44280784440, 1731036678270, 44184817939580, 813777827212550, 11583623256480548, 133881601767192816, 1303359284227317194, 10991187869604621942, 82068339562605570512

Offset: 1

Author

R. H. Hardin, Nov 29 2014

Keywords

• nonn

Comments

Row 7 of A251065

Examples

			Some solutions for n=1
..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0
..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0
..2..2....1..1....1..1....0..1....2..2....1..2....0..2....2..2....2..2....0..0
..0..1....0..2....1..1....0..1....0..2....2..2....1..2....1..1....0..0....0..2
..2..2....0..0....0..1....1..2....0..1....0..2....1..2....1..2....1..2....0..2
..0..2....1..1....1..2....0..1....1..2....1..1....1..0....0..0....1..1....0..1
..0..0....1..2....0..0....0..1....1..1....0..0....0..1....0..2....0..1....0..1
..2..2....1..1....0..1....0..2....0..1....0..2....2..1....2..2....2..1....1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..84