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A268247
Number of 3Xn 0..n arrays with every repeated value in every row greater than or equal to, and every column greater than, the previous repeated value.
0
6, 576, 216000, 197555340, 371713931400, 1257212773492866, 6967515866907769668, 59102884914387317492904, 728462977173724674571341120, 12523133152298313854607312469836
OFFSET
1,1
COMMENTS
Row 3 of A268246.
EXAMPLE
Some solutions for n=2
..2..1....2..1....2..0....1..2....2..0....1..0....0..0....2..0....0..0....1..0
..0..0....1..1....1..1....0..2....1..0....2..1....1..2....2..1....2..2....0..1
..1..1....0..2....2..2....0..1....2..1....0..1....2..2....0..1....0..0....0..0
CROSSREFS
Cf. A268246.
Sequence in context: A291953 A225206 A268207 * A345024 A134367 A255886
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 29 2016
STATUS
approved