A200769 Number of n X n 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, 13, 342, 7725, 91755, 17965438, 2189118202, 159001066390

Offset

1,1

Comments

Diagonal of A200777.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A200777.

Sequence in context: A110407 A340037 A062698 * A128341 A177007 A227170

Adjacent sequences: A200766 A200767 A200768 * A200770 A200771 A200772

Keyword

nonn

Author

R. H. Hardin, Nov 22 2011

Status

approved