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A180395
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Number of permutations of 1..n with both permutation and its inverse having exactly 5 maxima
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0
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0, 0, 0, 0, 0, 0, 0, 0, 213, 38970, 2199243, 66436204, 1334964325, 20003126222, 239548888455
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OFFSET
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1,9
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LINKS
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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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