%I #3 Mar 31 2012 12:35:44
%S 1,70,34650,62987418,303953291280,3208757131366020,
%T 65143699363358402128
%N Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, down, down, down
%K nonn
%O 1,2
%A _R. H. Hardin_ May 10 2010
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