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%I #5 Apr 07 2021 19:39:43
%S 1,2,6,16,74,304,1424,6554,36720,207648,1262922,7739400,57383696,
%T 429424444,3331954076,26331934036
%N Number of permutations of floor(i*5/4), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 17 2008