%I A151606
%S A151606 0,2,268128,256405004,82725015630,17440046568756
%N A151606 Number of permutations of 5 indistinguishable copies of 1..n arranged 
               in a circle with exactly 5 adjacent element pairs in decreasing order.
%Y A151606 Sequence in context: A152475 A124362 A058435 this_sequence A070694 A158346 
               A018854
%Y A151606 Adjacent sequences: A151603 A151604 A151605 this_sequence A151607 A151608 
               A151609
%K A151606 nonn
%O A151606 1,2
%A A151606 Ron Hardin (rhhardin(AT)att.net) May 21 2009