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A278626
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Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.
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1
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504, 103546, 24103803, 6594175430, 1892563134910, 540194658701142, 152561415660718514, 42854095125044269456, 11909803616605399424974, 3223604568067184016119193, 835430834890906525681829626
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=2
..2..0..1..1..1..0..0. .0..2..2..2..2..1..1. .2..2..1..1..0..1..0
..2..1..2..2..2..2..2. .0..2..2..2..2..2..0. .2..2..2..0..2..1..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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