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A209649
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Number of nX7 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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2
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35, 1225, 7210, 24990, 65765, 145775, 287140, 518700, 876855, 1406405, 2161390, 3205930, 4615065, 6475595, 8886920, 11961880, 15827595, 20626305, 26516210, 33672310, 42287245, 52572135, 64757420, 79093700, 95852575, 115327485
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OFFSET
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1,1
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COMMENTS
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Column 7 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) = 7*n^5 + 70*n^4 + (35/3)*n^3 - (105/2)*n^2 - (7/6)*n
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EXAMPLE
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Some solutions for n=4
..1..0..1..0..1..0..1....0..1..0..1..1..1..0....1..1..0..1..1..0..1
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
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CROSSREFS
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Sequence in context: A207665 A208006 A207568 * A207756 A207937 A208697
Adjacent sequences: A209646 A209647 A209648 * A209650 A209651 A209652
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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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