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%I #5 Apr 07 2021 19:18:11
%S 1,2,6,16,74,304,1424,7946,44418,271160,1760020,13590836,107901418,
%T 882093328,8656696052,83441646558
%N Number of permutations of floor(i*9/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 17 2008