A268250 Number of 3Xn 0..n arrays with every repeated value in every row greater than, and every column greater than or equal to, the previous repeated value.

8, 729, 216000, 185193000, 337153536000, 1125058699232216, 6206699397581803008, 52644642506757331562232, 650274909835389362799561000, 11215805818364638436336901795648

Offset: 1

Author

R. H. Hardin, Jan 29 2016

Keywords

• nonn

Comments

Row 3 of A268249.

Examples

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

Crossrefs

Cf. A268249.