%I #3 Mar 31 2012 12:35:44
%S 1,70,29874,43724128,163394718481,1305717814847931,
%T 19780733910930967382
%N Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, up, up
%K nonn
%O 1,2
%A _R. H. Hardin_ May 10 2010
