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Search: id:A151577
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| A151577 |
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Number of permutations of 1..n arranged in a circle with exactly 4 adjacent element pairs in decreasing order. |
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2
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| 0, 5, 156, 2114, 19328, 140571, 882340, 5007112, 26441856, 132439905, 637468300, 2976161790, 13569454592
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