A200852 Number of nX2 0..4 arrays with every row and column running average nondecreasing rightwards and downwards.

15, 105, 647, 3728, 20656, 111222, 586908, 3047226, 15620118, 79228317, 398364306, 1988133262, 9858922561, 48617189158, 238575216150, 1165684780558, 5673701149975, 27520684819357, 133080240201400, 641746039540686

Offset: 1

Author

R. H. Hardin Nov 23 2011

Keywords

• nonn

Comments

Column 2 of A200858

Examples

			Some solutions for n=3
..1..3....0..1....0..0....0..3....0..3....0..0....0..1....0..2....1..1....0..0
..1..4....0..1....2..3....0..3....2..3....1..4....0..3....2..2....3..3....1..4
..4..4....0..1....3..4....3..3....4..4....1..3....3..4....2..4....3..4....4..4
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..140