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A206183
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Number of (n+1) X 4 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.
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1
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15616, 205804, 3802676, 95187756, 2674444796, 78597249508, 2345626036136, 70435464744476, 2120394113295768, 63902858041046532, 1926797824397810952, 58109661058209293020, 1752687447844172570092, 52866528655142833934812
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OFFSET
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1,1
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COMMENTS
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Column 3 of A206188.
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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:
..2..1..0..1....2..3..2..0....1..3..2..0....1..0..0..0....1..2..1..3
..1..3..1..2....2..3..0..0....3..3..0..0....0..3..2..1....2..3..2..0
..0..1..3..1....0..0..2..1....1..0..3..1....0..2..2..1....0..1..3..1
..2..3..1..2....3..0..1..1....0..0..1..1....0..1..1..1....1..2..0..3
..3..0..2..3....2..2..0..2....2..1..0..3....1..0..3..2....0..1..3..0
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CROSSREFS
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Sequence in context: A262793 A206104 A205654 * A205365 A254029 A129152
Adjacent sequences: A206180 A206181 A206182 * A206184 A206185 A206186
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 04 2012
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STATUS
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approved
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