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A076220 Number of permutations of 1..n in which every pair of adjacent numbers are relatively prime. +0
11
1, 2, 6, 12, 72, 72, 864, 1728, 13824, 22032, 555264, 476928, 17625600, 29599488, 321115392, 805146624, 46097049600, 36481536000, 2754120268800, 3661604352000, 83905105305600, 192859121664000, 20092043520000000, 15074060547686400 (list; graph; listen)
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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

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