A186213 Number of (n+1)X4 0..2 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant.

609, 18873, 308593, 6275745, 116461359, 2259545215, 43035959317, 826432933951, 15812881574729, 303053537534437, 5803938965263449, 111189559377323685, 2129829613338983271, 40799287763726714069, 781535113579919280543

Offset: 1

Author

R. H. Hardin Feb 15 2011

Keywords

• nonn

Comments

Column 3 of A186218

Examples

			Some solutions for 3X4
..2..2..1..0....0..1..1..0....1..1..0..0....2..0..0..2....1..0..1..0
..0..0..0..0....2..2..0..0....1..1..0..2....0..0..0..0....2..0..2..0
..1..0..1..2....1..1..0..0....0..0..0..0....2..0..2..0....1..0..2..0
		

Links

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