A250668 Number of (n+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

104, 5154, 388916, 41503790, 5803025694, 1009432228498, 210335029800118

Offset: 1

Author

R. H. Hardin, Nov 26 2014

Keywords

• nonn

Comments

Diagonal of A250676.

Examples

			Some solutions for n=2
..1..1..1....1..2..0....2..2..1....0..2..0....3..0..3....1..0..0....1..0..2
..2..2..2....1..2..3....2..3..3....0..2..1....1..3..0....2..2..2....0..1..3
..2..2..2....1..2..3....2..3..3....1..1..3....3..1..3....2..2..2....2..3..1
		

Crossrefs

Cf. A250676.