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Search: id:A107761
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| A107761 |
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Number of permutations of (1,3,5,7,9,...,2n-1) where every adjacent pair in the permutation are coprime. |
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3
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| 1, 2, 6, 24, 72, 480, 3600, 9600, 108000, 1270080, 4795200, 74088000, 768539520, 4759413120, 94182359040, 1893397524480, 11353661706240, 122634632171520, 3104438623534080, 23063946114908160, 664424069072117760
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