%I #5 Apr 07 2021 19:22:50
%S 1,2,6,24,74,368,2140,11468,78848,636700,4866484,43893944,452631554,
%T 4475626268,50128776656,625960035472
%N Number of permutations of floor(i*4/3), i=0..n-1, with all sums of two adjacent terms unique.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 17 2008