%I #5 Apr 07 2021 19:26:26
%S 1,2,6,24,120,624,4176,32620,284384,2803702,29664334,339061272,
%T 4391825384,58843870478,866121264934
%N Number of permutations of 0..n-1 with all sums of 2 through 3 adjacent terms squared respectively unique.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 11 2008