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A205418
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Number of (n+1)X3 0..3 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors
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1
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2768, 62716, 1448498, 33701202, 782598960, 18167227774, 421657055138, 9789425083082, 227224401122368, 5275018373510432, 122445180549684530, 2842463146633784148, 65981768963303928002, 1531684236219961864660
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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=4
..0..1..0....2..0..2....0..0..1....2..1..1....2..0..0....0..1..0....0..1..0
..0..1..0....0..1..2....0..2..3....0..2..1....1..3..0....0..0..1....1..3..2
..0..2..1....3..2..2....2..3..1....0..3..2....2..3..0....2..1..3....3..1..0
..3..0..0....1..2..1....0..3..3....2..2..1....0..2..1....3..0..1....2..2..1
..3..1..1....1..3..2....0..0..0....0..0..1....3..3..2....0..1..2....1..3..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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