%I

%S 0,180,2520,25200,211680,1839600,17186400,168168000,1676875200,

%T 16972355400

%N Number of permutations of 1..n with the sequence of sums of 4 adjacent elements having exactly 2 maxima

%K nonn

%O 5,2

%A _R. H. Hardin_ Jul 25 2010