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A107762
Number of permutations of (1,3,5,7,9,...,2n-1) in which every pair of adjacent numbers as well as the first and the last entries are relatively prime.
2
1, 2, 6, 24, 60, 432, 3360, 6912, 86400, 1080000, 3432000, 57542400, 601810560, 3374784000, 71391196800, 1506917744640, 8134703216640, 87731370397440, 2330058011258880, 15991083879321600, 484342868413071360
OFFSET
1,2
COMMENTS
Odd analog of A102381. Equals n*A107763(n).
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Jun 11 2005
EXTENSIONS
More terms from Max Alekseyev, Jun 11 2005
STATUS
approved