A152335 - OEIS

A152335

Number of permutations of floor(i*5/2), i=0..n-1, with all sums of 4 adjacent terms unique.

%I #5 Apr 07 2021 20:07:27

%S 1,2,6,24,120,640,4164,28224,237168,2133992,21136148,226558932,

%T 2656690332,33144866692,444798029884,6309964631348

%N Number of permutations of floor(i*5/2), i=0..n-1, with all sums of 4 adjacent terms unique.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 02 2008