%I #3 Mar 31 2012 12:35:45
%S 1,2,6,12,72,336,1824,13152,134880,649296,8572800,102194400,
%T 1033046880,12143232960,210042192960,2372176649280,46447968686400,
%U 648516678024960
%N Number of permutations of 3..n+2 with no element divisible by an adjacent element.
%K nonn
%O 1,2
%A _R. H. Hardin_ Jun 17 2010
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