A201275 Number of nX6 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

1, 9, 41, 143, 442, 1260, 3113, 7331, 15969, 32737, 63942, 120318, 216392, 377902, 640970, 1055829, 1699241, 2679576, 4132842, 6267048, 9345121, 13712218, 19841970, 28343579, 39963063, 55722233, 76873873, 104958237, 141966994

Offset

1,2

Comments

Column 6 of A201277

Links

R. H. Hardin, Table of n, a(n) for n = 1..101

Example

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

Crossrefs

Sequence in context: A001846 A271663 A034441 * A056243 A083584 A276780

Adjacent sequences: A201272 A201273 A201274 * A201276 A201277 A201278

Keyword

nonn

Author

R. H. Hardin Nov 29 2011

Status

approved