A147904 - OEIS

A147904

Number of permutations of floor(i*7/6), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.

%I #5 Apr 07 2021 19:39:28

%S 1,2,6,16,54,232,1194,5348,28874,153508,860486,4887496,36291722,

%T 265127656,2037271658,15840444682

%N Number of permutations of floor(i*7/6), 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