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A202744
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Number of 3Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns
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1
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2, 8, 38, 140, 638, 3032, 14258, 70136, 350594, 1767452, 9029918, 46519544, 241210598, 1258499756, 6598909298, 34748813672, 183679125026, 974136322892, 5181534476414, 27634187724392, 147730324961126, 791463055043228
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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=5
..1..0..1..0..0....1..1..0..0..0....1..1..0..1..0....0..1..0..1..1
..1..0..0..0..1....0..1..0..1..0....1..1..0..1..0....1..1..0..1..0
..0..1..1..0..0....0..0..1..1..0....1..0..0..1..1....1..1..0..1..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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