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
Keywords
Examples
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.
Comments