%I #3 Mar 31 2012 12:35:44
%S 1,70,34650,62234190,293951256700,3019523592165814,
%T 59424738039571181776
%N Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, down, down, down
%K nonn
%O 1,2
%A _R. H. Hardin_ May 10 2010
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