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A358809
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a(n) is the maximal permanent of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.
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4
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OFFSET
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0,3
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LINKS
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EXAMPLE
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a(2) = 4:
[0, 2;
2, 1]
a(3) = 186:
[0, 4, 5;
4, 2, 3;
5, 3, 1]
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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