A200527 Number of n X n 0..2 arrays with every row and column running average nondecreasing rightwards and downwards

3, 20, 243, 4848, 167171, 10000162, 1056792824, 201092476918, 70051408245054, 45119084364602004

Offset

1,1

Comments

Diagonal of A200534

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A248653 A218374 A219541 * A237431 A237652 A256018

Adjacent sequences: A200524 A200525 A200526 * A200528 A200529 A200530

Keyword

nonn

Author

R. H. Hardin Nov 18 2011

Status

approved