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A251011
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Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the maximum of its antidiagonal elements
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0
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63, 6653, 4006992, 13508173078, 254604954671538, 26881736550623664594, 15886176013807764828256390, 52561086204509370088955346390030, 973565980065757968304861029019267809746
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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 n=2
..2..1..0....2..2..1....1..1..2....1..2..0....0..2..1....2..2..1....2..1..1
..0..1..2....0..2..1....1..2..1....0..1..2....2..2..0....1..1..1....2..2..1
..1..1..1....1..2..1....1..1..0....0..2..1....2..1..1....0..1..2....2..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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