A200530 Number of nX4 0..2 arrays with every row and column running average nondecreasing rightwards and downwards.

19, 146, 905, 4848, 23925, 111085, 494555, 2132979, 8981773, 37125420, 151253915, 609247412, 2432002859, 9638730963, 37983584772, 149003379789, 582403346152, 2269881052166, 8826625108206, 34261690527204, 132805131519232

Offset

1,1

Comments

Column 4 of A200534

Links

R. H. Hardin, Table of n, a(n) for n = 1..57

Example

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

Crossrefs

Sequence in context: A081590 A093646 A264679 * A183748 A241620 A069423

Adjacent sequences: A200527 A200528 A200529 * A200531 A200532 A200533

Keyword

nonn

Author

R. H. Hardin, Nov 18 2011

Status

approved