A250436 Number of (n+1)X(n+1) 0..2 arrays with nondecreasing sum of every two consecutive values in every row and column.

81, 2160, 160000, 8750000, 937890625, 74118870000, 9682651996416, 958582547645184, 141763707879526656, 16346105372357849088, 2632478657451209588736, 338880211548064890612480

Offset: 1

Author

R. H. Hardin, Nov 22 2014

Keywords

• nonn

Comments

Diagonal of A250443

Examples

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