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A186821
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Half the number of (n+2)X7 binary arrays with each 3X3 subblock having sum 4 or 5
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1
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70767, 1190637, 18829218, 315843055, 5634207241, 99751773733, 1783799078413, 32322581577916, 584495537657334, 10594536209194545, 192625016377623752, 3500057158418808686, 63637200466766220870, 1157907423273867982529
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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 4X7 with a(1,1)=0
..0..0..1..0..0..1..0....0..0..1..0..1..0..0....0..0..1..0..0..0..1
..0..1..0..0..1..0..0....0..1..0..0..1..1..0....0..1..1..1..1..1..0
..0..1..1..0..1..1..0....0..1..1..1..0..1..1....0..1..0..0..1..0..0
..1..0..1..0..0..1..1....1..0..0..1..0..0..0....0..1..0..0..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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