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A183789
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Half the number of (n+1)X7 0..2 arrays with no 2X2 subblock having sum 4
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1
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503676, 253372446, 124516635830, 61615880574766, 30424632455651757, 15033760617564577257, 7426828822889981226524, 3669246745844998053514738, 1812745552132801952938026578, 895574493615900816704817147361
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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 3X7
..0..0..0..0..0..0..1....0..0..0..0..0..0..0....0..0..0..0..0..1..2
..0..0..0..0..0..0..1....0..0..0..0..0..1..0....0..0..0..0..0..1..1
..2..1..0..1..0..0..0....2..1..0..1..2..0..0....2..1..1..2..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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