A147909 - OEIS

A147909

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

%I #5 Apr 07 2021 19:38:51

%S 1,2,6,16,74,368,1924,10496,65446,426596,3048508,22901328,189677816,

%T 1628971852,15211951462,146663420606

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 17 2008