A200773 Number of nX4 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

7, 20, 31, 342, 1368, 1806, 18801, 66784, 80772, 855668, 3041384, 3594128, 37388832, 130414591, 152057520, 1585602417, 5503438740, 6353866245, 65731117389, 226849040721, 260912168378, 2698875915314, 9278417689608, 10609858568929

Offset

1,1

Comments

Column 4 of A200777

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Example

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

Crossrefs

Sequence in context: A214924 A333858 A319966 * A269044 A063235 A063151

Adjacent sequences: A200770 A200771 A200772 * A200774 A200775 A200776

Keyword

nonn

Author

R. H. Hardin Nov 22 2011

Status

approved