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A233309
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Number of (n+1)X(1+1) 0..4 arrays with row and column sums nondecreasing, and no adjacent elements equal
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1
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92, 463, 2311, 9822, 41192, 160280, 617500, 2278154, 8346612, 29720846, 105322406, 365709441, 1265566649, 4312665297, 14661080626, 49240073950, 165092049733, 548097358680, 1817406550199, 5977145363030, 19640272703424, 64090628827653
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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=5
..1..4....1..0....0..1....1..0....0..2....4..0....1..2....1..2....0..1....2..1
..3..2....0..2....1..0....2..1....3..0....1..3....2..1....0..3....3..2....0..4
..1..4....2..1....0..3....0..3....0..4....0..4....1..4....4..0....2..3....1..3
..4..1....0..3....2..1....3..1....3..1....4..1....4..1....1..3....3..2....0..4
..1..4....1..2....1..3....0..4....4..3....3..2....1..4....2..4....1..4....1..3
..4..2....2..1....0..4....1..3....3..4....2..4....4..1....4..2....2..3....3..2
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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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