A203486 Number of nX3 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

12, 80, 624, 3760, 25002, 171068, 1107888, 7411872, 50469114, 335270710, 2266967088, 15497479060, 104719636176, 715192200880, 4919017621164, 33647413101184, 231673960276602, 1602349695229334, 11054192845643568

Offset: 1

Author

R. H. Hardin Jan 02 2012

Keywords

• nonn

Comments

Column 3 of A203491

Examples

			Some solutions for n=5
..0..0..1....1..2..2....1..1..0....2..1..0....2..1..2....1..1..0....1..0..2
..0..1..0....2..1..2....1..1..0....2..1..0....1..2..2....0..1..1....2..1..0
..0..1..0....2..2..1....1..1..0....2..1..0....1..2..2....2..0..0....2..0..1
..0..1..0....2..1..2....0..0..2....0..1..2....1..2..2....0..2..0....2..0..1
..1..0..0....2..1..2....2..0..0....0..1..2....1..2..2....2..0..0....2..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..106