A184372 1/3 the number of (n+1)X6 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.

58077, 15754461, 4210059673, 1127256514575, 301753233626727, 80778452206783159, 21624059735461675335, 5788675585887326994869, 1549605510397241533259837, 414823258633731476239250435

Offset: 1

Author

R. H. Hardin Jan 12 2011

Keywords

• nonn

Comments

Column 5 of A184376

Examples

			Some solutions for 3X6 with a(1,1)=0
..0..0..0..0..2..1....0..0..0..0..2..1....0..0..0..0..0..2....0..0..0..0..0..0
..2..0..0..0..1..1....2..0..0..0..0..0....0..0..0..1..0..0....2..0..0..1..0..2
..1..1..1..0..1..2....2..0..2..0..0..2....1..1..2..2..2..0....1..0..2..1..0..0
		

Links

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