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A205657
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Number of (n+1) X 7 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.
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1
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7854572, 76028256, 711793356, 10795687000, 183567605276, 2994560119488, 54588666013136, 946322990916328, 17957465680336828, 316121808578717168, 6072355548317464448, 107584942896241083216, 2075883483766878489344
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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:
..2..3..0..0..2..0..3....1..0..0..0..0..3..1....3..3..1..0..0..0..0
..3..1..3..2..1..2..1....2..2..0..2..0..3..1....0..3..1..2..3..0..3
..1..1..1..1..1..1..1....1..3..1..0..1..0..2....1..0..3..2..1..3..0
..1..1..1..1..1..1..1....2..3..1..0..1..0..2....1..0..3..0..1..3..0
..0..0..0..1..2..1..3....1..1..3..1..2..1..3....3..2..1..0..2..1..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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