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A209648
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Number of nX6 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically
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1
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22, 484, 2354, 7128, 16830, 34012, 61754, 103664, 163878, 247060, 358402, 503624, 688974, 921228, 1207690, 1556192, 1975094, 2473284, 3060178, 3745720, 4540382, 5455164, 6501594, 7691728, 9038150, 10553972, 12252834, 14148904, 16256878
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OFFSET
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1,1
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COMMENTS
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Column 6 of A209650
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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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FORMULA
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Empirical: a(n) = 22*n^4 + (88/3)*n^3 - 22*n^2 - (22/3)*n
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EXAMPLE
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Some solutions for n=4
..0..1..0..1..1..0....0..1..0..1..1..0....1..1..1..0..1..0....1..0..1..1..1..0
..1..0..1..0..1..1....0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..1..1..1
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..1..0..1
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..1..0..1
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CROSSREFS
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Sequence in context: A207664 A208005 A207567 * A207755 A207936 A208696
Adjacent sequences: A209645 A209646 A209647 * A209649 A209650 A209651
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Mar 11 2012
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STATUS
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approved
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