%I A151600
%S A151600 0,11640,10421120,2396959400,324776205024,34107115135800
%N A151600 Number of permutations of 4 indistinguishable copies of 1..n arranged 
               in a circle with exactly 5 adjacent element pairs in decreasing order.
%Y A151600 Sequence in context: A162865 A049051 A154053 this_sequence A015630 A045307 
               A046192
%Y A151600 Adjacent sequences: A151597 A151598 A151599 this_sequence A151601 A151602 
               A151603
%K A151600 nonn
%O A151600 2,2
%A A151600 Ron Hardin (rhhardin(AT)att.net) May 21 2009