%I #3 Mar 31 2012 12:35:18
%S 0,3348,20944448,15679525340,5314573995408,1226608986189748
%N Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 6 adjacent element pairs in decreasing order.
%K nonn
%O 2,2
%A _R. H. Hardin_ May 21 2009