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A147942 Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique. 0

%I

%S 1,2,6,16,74,304,1424,7946,39908,231442,1351720,9447558,67300148,

%T 488187450,4266438488,36066619444

%N Number of permutations of floor(i*9/7), 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

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Last modified May 27 12:58 EDT 2022. Contains 354097 sequences. (Running on oeis4.)