A200529 Number of nX3 0..2 arrays with every row and column running average nondecreasing rightwards and downwards

11, 57, 243, 905, 3135, 10292, 32556, 100065, 300847, 888587, 2586994, 7441963, 21193523, 59838942, 167704775, 466986683, 1293018711, 3562315723, 9770764284, 26693067952, 72663897633, 197170483178, 533459459628, 1439508706370

Offset

1,1

Comments

Column 3 of A200534

Links

R. H. Hardin, Table of n, a(n) for n = 1..122

Example

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

Crossrefs

Sequence in context: A244497 A101094 A187693 * A289255 A275795 A014470

Adjacent sequences: A200526 A200527 A200528 * A200530 A200531 A200532

Keyword

nonn

Author

R. H. Hardin Nov 18 2011

Status

approved