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A206672
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Number of (n+1) X 5 0..2 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors.
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1
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7572, 47106, 319698, 2046168, 14200242, 97476666, 700650756, 5009030472, 36741349836, 268711237302, 1994098917228, 14775953774574, 110406362734710, 824271504884262, 6183800255704620, 46369341402893430, 348694541730025260
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OFFSET
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1,1
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COMMENTS
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Column 4 of A206676.
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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EXAMPLE
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Some solutions for n=4:
..0..1..1..2..0....1..0..2..1..0....0..2..2..0..2....0..0..0..1..1
..1..2..1..0..0....2..2..0..0..2....2..0..1..2..2....0..0..1..0..0
..0..0..0..1..2....1..0..0..0..2....2..1..1..0..1....2..2..0..0..0
..0..0..2..1..2....2..0..0..2..1....0..1..1..2..1....0..1..1..2..1
..2..2..0..0..1....2..1..2..1..1....2..1..0..0..1....0..1..1..0..0
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CROSSREFS
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Sequence in context: A031585 A031765 A205740 * A205516 A260036 A064872
Adjacent sequences: A206669 A206670 A206671 * A206673 A206674 A206675
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 11 2012
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STATUS
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approved
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