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Number of permutations of 9..n+8 with no element greater than or equal to the sum of its neighbors
0

%I #2 Mar 31 2012 12:35:48

%S 1,0,2,6,30,180,1260,10080,90720,907200,9797760,114287040,1416703680,

%T 18712086480,260499022680,3833521421760,59158317014280,959784091498944

%N Number of permutations of 9..n+8 with no element greater than or equal to the sum of its neighbors

%K nonn

%O 1,3

%A _R. H. Hardin_ Sep 23 2010