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Number of permutations of 1..n with all sums of 2 through 7 adjacent terms respectively unique.
0

%I #5 Apr 07 2021 19:24:33

%S 1,2,6,16,54,232,936,3880,17302,81584,409012,2138674,11754832,

%T 66857094,395646912,2421309886,15276353934

%N Number of permutations of 1..n with all sums of 2 through 7 adjacent terms respectively unique.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 11 2008