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A086595
Number of ways to arrange the numbers 1..n in a circle such that every two adjacent numbers are relatively prime.
+0
6
1, 1, 2, 2, 12, 4, 72, 72, 720, 576, 22032, 7776, 476928, 400896, 6352992, 8515584, 805146624, 279023616, 36481536000, 23627980800, 881012367360, 1065509240832, 192859121664000, 65362194432000, 10489384048435200
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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