%I #3 Mar 31 2012 12:35:45
%S 0,20,700,12390,172620,2112012,23983344,260353632,2749114368,
%T 28553296200,293791160520
%N Number of permutations of 1..n with the sequence of sums of 2 adjacent elements having exactly 3 maxima
%K nonn
%O 5,2
%A _R. H. Hardin_ Jul 25 2010