A201447 Number of nX4 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

1, 9, 29, 112, 261, 846, 1720, 4193, 8065, 16693, 29073, 55954, 90874, 158301, 249828, 409302, 611841, 962288, 1392970, 2091478, 2957586, 4286258, 5893598, 8347259, 11221370, 15440747, 20464931, 27577548, 35834857, 47497364, 60856456, 79217039

Offset: 1

Author

R. H. Hardin Dec 01 2011

Keywords

• nonn

Comments

Column 4 of A201451

Examples

			Some solutions for n=10
..0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..1
..0..0..0..1....0..1..1..1....0..0..1..1....0..0..0..0....0..0..1..1
..0..1..1..1....0..1..1..1....0..0..1..1....0..0..2..2....0..1..2..3
..0..1..2..2....0..1..1..1....0..0..1..1....1..1..2..2....0..1..2..3
..0..2..2..2....0..1..2..3....0..1..1..1....1..1..2..3....0..1..2..3
..1..2..2..3....0..2..2..3....2..2..3..3....1..1..2..3....0..1..2..3
..1..2..2..3....0..2..2..3....2..2..3..3....1..1..2..3....0..1..2..3
..1..2..3..3....2..2..2..3....2..2..3..3....1..1..2..3....1..1..2..3
..1..3..3..3....2..3..3..3....2..2..3..3....2..3..3..3....2..2..2..3
..1..3..3..3....2..3..3..3....2..2..3..3....2..3..3..3....2..3..3..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..82