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%I #3 Mar 31 2012 12:35:42
%S 56,148146,788946320,5712786772130,49254897805981056
%N Number of permutations of n copies of 1..7 with all adjacent differences <= 2 in absolute value.
%K nonn
%O 1,1
%A _R. H. Hardin_ May 06 2010