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A205241
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Number of (n+1)X4 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors
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1
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2990, 36478, 515162, 7051340, 97718448, 1334713506, 18384097800, 251875514320, 3461757498588, 47498508227712, 652418339064389, 8955881958241476, 122986967957641438, 1688504461834087204, 23185409190832766293
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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
..1..0..0..0....0..0..2..2....0..0..2..1....0..1..2..2....0..2..1..2
..1..2..0..0....1..2..0..0....1..2..0..0....0..0..1..1....1..1..1..1
..0..0..2..0....2..0..0..2....1..2..2..2....2..1..2..2....0..0..1..2
..1..1..2..0....2..2..1..2....1..0..0..1....1..0..2..0....2..0..1..0
..2..1..2..1....0..0..1..2....2..2..0..1....0..1..2..2....2..0..2..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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