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A233029
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Number of (n+1)X(2+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal
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1
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96, 642, 3132, 16296, 77353, 337570, 1459711, 6131600, 25014797, 100647020, 399073108, 1561490768, 6050110218, 23239177456, 88590795541, 335553550058, 1263942149575, 4737487677280, 17680474805387, 65735112648424
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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
..0..2..3....0..1..3....1..0..1....1..0..2....0..2..1....1..0..3....2..0..2
..3..1..2....1..3..0....0..2..0....0..2..1....2..1..0....0..3..1....0..3..1
..1..2..3....2..0..2....2..1..2....1..0..3....0..2..1....2..0..3....2..0..3
..2..3..1....0..1..3....1..2..3....0..3..1....2..1..2....1..3..1....1..3..1
..3..1..2....2..3..0....2..3..1....3..0..3....0..2..3....0..2..3....0..2..3
..2..3..1....3..0..2....1..2..3....1..3..2....3..0..2....3..0..2....1..3..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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