%I #5 Apr 07 2021 20:12:00
%S 1,2,6,24,120,608,3684,23136,185772,1557704,14531768,142953580,
%T 1530728460,17401543208,210735290068,2698171998814
%N Number of permutations of floor(i*9/8), i=0..n-1, with all sums of 4 adjacent terms unique.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 02 2008