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A183773
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Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock having exactly 2 ones
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0
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5, 47, 730, 21935, 1146964, 112439612, 19815396763, 6453534773135, 3829236554668274, 4179465974043040784, 8354373579461755560239, 30686484702497770109712496, 206872691877488790419478443459
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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 with a(1,1)=0 for 3X3
..0..1..0....0..0..0....0..0..1....0..0..0....0..0..0....0..1..0....0..0..0
..0..0..0....1..0..0....0..0..0....0..0..1....0..0..0....0..0..0....0..1..0
..0..0..0....0..0..0....1..0..0....0..1..1....1..0..1....0..0..1....1..1..1
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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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