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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.
0
8, 729, 216000, 185193000, 337153536000, 1125058699232216, 6206699397581803008, 52644642506757331562232, 650274909835389362799561000, 11215805818364638436336901795648
OFFSET
1,1
COMMENTS
Row 3 of A268249.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 29 2016
STATUS
approved