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A268205
Number of 1Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value.
3
2, 9, 60, 570, 6960, 104006, 1837752, 37478718, 866361210, 22384298772, 639235846656, 19993319047663, 679693673292816, 24954856965472485, 984056034148827632, 41479800266522142954, 1861205533117885580022
OFFSET
1,1
COMMENTS
Row 1 of A268204.
LINKS
EXAMPLE
Some solutions for n=6
..4..1..5..1..3..3....4..2..6..4..4..0....5..0..0..6..5..0....3..1..2..6..1..3
CROSSREFS
Cf. A268204.
Sequence in context: A269634 A269530 A269672 * A269600 A269460 A207649
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2016
STATUS
approved