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Search: id:A151584
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| A151584 |
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Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order. |
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1
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| 0, 36, 1088, 14220, 134928, 1093316, 8120064, 57280284, 391301840
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