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A186907
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Number of (n+2)X3 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order
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1
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2066505, 59969593, 1276581035, 22000126445, 319741716426, 4028133387613, 44902749582723, 449959668016830, 4103914508092780, 34409633745323847, 267409041699567853, 1939370255679423718, 13202565796526137619
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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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FORMULA
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Polynomial of degree 83 in n, see link.
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EXAMPLE
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Some solutions for 4X3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..3..3....0..0..2....0..3..3....0..1..5....0..0..0....0..0..1....0..0..2
..0..3..4....0..1..1....0..4..5....0..6..5....0..2..5....0..3..3....0..5..2
..0..6..6....3..2..1....2..3..3....6..4..6....3..3..5....0..5..4....6..0..0
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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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