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A186938
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Number of (n+1)X9 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
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1
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7528, 431656, 5769904, 102475864, 1627815216, 28477050608, 475637108896, 8132915749352, 137957613500896, 2350443973085288, 39973429999524952, 680134904601046536, 11574046354140738136, 196965440910144079296
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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 4X9
..0..1..1..1..1..0..0..1..0....0..0..1..0..0..0..1..1..0
..0..1..0..1..1..0..0..1..1....0..1..1..0..0..1..1..1..0
..0..0..0..0..1..0..0..1..1....0..0..1..1..0..1..1..1..0
..0..0..0..0..1..0..0..1..1....0..0..0..1..0..1..1..0..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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