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

1,1

Comments

Row 3 of A268249.

Links

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

Example

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.

Sequence in context: A014387 A220641 A017007 * A268106 A023813 A068895

Adjacent sequences: A268247 A268248 A268249 * A268251 A268252 A268253

Keyword

nonn

Author

R. H. Hardin, Jan 29 2016

Status

approved