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A268206
Number of 2Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value.
2
4, 81, 3600, 324900, 48441600, 10817248036, 3377332413504, 1404654302923524, 750581746192664100, 501056831514160707984, 408622467650013146382336, 399732806541644129265761569, 461983489514281294192077209856
OFFSET
1,1
COMMENTS
Row 2 of A268204.
LINKS
EXAMPLE
Some solutions for n=3
..0..1..1....1..3..1....3..1..2....2..3..1....3..2..2....3..0..1....2..2..0
..1..2..1....3..0..1....3..0..3....1..2..0....2..1..3....0..1..0....2..1..2
CROSSREFS
Cf. A268204.
Sequence in context: A264197 A221251 A128911 * A337155 A268105 A068087
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2016
STATUS
approved