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Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.
0

%I #3 Mar 31 2012 12:35:18

%S 0,11640,10421120,2396959400,324776205024,34107115135800

%N Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.

%K nonn

%O 2,2

%A _R. H. Hardin_ May 21 2009