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A190532
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Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 antidiagonally
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1
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64, 768, 13824, 331776, 11943936, 644972544, 54177693696, 6826389405696, 1351625102327808, 416300531516964864, 203987260443312783360, 157070190541350843187200, 193510474746944238806630400
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Some solutions for 4X4
..1..0..0..1....1..0..0..0....1..0..0..1....1..0..0..0....1..0..0..0
..0..1..0..0....0..0..0..1....0..1..1..0....0..0..0..0....0..0..0..0
..0..0..1..0....0..0..0..1....0..1..1..0....0..0..0..0....0..0..1..1
..1..0..0..0....0..1..1..0....1..0..0..1....0..0..0..0....0..0..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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