A200771 Number of nX2 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.

3, 5, 5, 20, 37, 31, 144, 273, 218, 1054, 2009, 1574, 7738, 14793, 11474, 57029, 109296, 84246, 421938, 810268, 621914, 3132630, 6025862, 4611044, 23331465, 44944997, 34314054, 174267851, 336126752, 256168546, 1304988740, 2519821169, 1917689311

Offset

1,1

Comments

Column 2 of A200777

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A392775 A165235 A370553 * A072624 A147976 A019247

Adjacent sequences: A200768 A200769 A200770 * A200772 A200773 A200774

Keyword

nonn

Author

R. H. Hardin, Nov 22 2011

Status

approved