A268207 Number of 3Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value.

6, 576, 178068, 157322070, 292870561470, 994136348047368, 5558748617057735268, 47663280965883681947286, 594023446572575009757975426, 10322377292292037627789408184574

Offset

1,1

Comments

Row 3 of A268204.

Links

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

Example

Some solutions for n=3
..2..0..3....2..3..0....2..2..0....0..3..0....1..0..0....0..3..1....0..2..3
..0..0..2....1..0..2....3..0..1....3..3..0....2..0..2....3..2..3....0..1..3
..0..2..3....2..1..0....2..0..3....1..0..3....1..2..1....3..3..1....2..1..1

Crossrefs

Cf. A268204.

Sequence in context: A332156 A291953 A225206 * A268247 A345024 A134367

Adjacent sequences: A268204 A268205 A268206 * A268208 A268209 A268210

Keyword

nonn

Author

R. H. Hardin, Jan 28 2016

Status

approved