A200772 Number of nX3 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

2, 5, 13, 31, 77, 217, 553, 1438, 3849, 9634, 24872, 65658, 165619, 425229, 1108871, 2787741, 7090082, 18273124, 45935694, 116433625, 297919225, 747625324, 1886048964, 4791865798, 11998842755, 30184656867, 76352766306, 190890209361

Offset

1,1

Comments

Column 3 of A200777

Links

R. H. Hardin, Table of n, a(n) for n = 1..99

Example

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

Crossrefs

Sequence in context: A369434 A349276 A307569 * A099515 A056367 A378111

Adjacent sequences: A200769 A200770 A200771 * A200773 A200774 A200775

Keyword

nonn

Author

R. H. Hardin Nov 22 2011

Status

approved