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A092186 a(n) = 2(m!)^2 for n = 2m and m!(m+1)! for n = 2m+1. +0
7
2, 1, 2, 2, 8, 12, 72, 144, 1152, 2880, 28800, 86400, 1036800, 3628800, 50803200, 203212800, 3251404800, 14631321600, 263363788800, 1316818944000, 26336378880000, 144850083840000, 3186701844480000, 19120211066880000, 458885065605120000, 2982752926433280000 (list; graph; listen)
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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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