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A278806
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Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.
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1
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36, 1254, 69834, 6275546, 725674326, 89730161098, 10811999412826, 1224101415304069, 128795068372302728, 12581278164317910030, 1143931690129837256876, 97156838914464540981998
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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=3
..1..1..1..1..0..0..0. .2..1..1..0..0..0..0. .2..2..1..1..1..1..1
..2..1..0..0..1..1..1. .2..2..1..2..1..0..0. .2..2..2..1..1..0..0
..2..1..2..0..1..1..0. .2..2..2..1..1..2..1. .2..2..2..2..2..2..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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