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A190536
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Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 diagonally or antidiagonally
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1
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56, 528, 6600, 100980, 2117870, 61630794, 2607217770, 156166134300, 13953736838272, 1844353230617676, 367051670671034640, 109228902733245482050, 48925662805948380686500
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