A177303 - OEIS

%I #6 Jan 19 2016 18:22:54

%S 1,1,252,756756,11732745024,52977847995072,131319696504676680,

%T 302061042944500510428,847432462636241316703042

%N Number of permutations of 5 copies of 1..n with all adjacent differences <= 3 in absolute value.

%C a(n) = (5n)!/120^n for n<=4.

%Y Cf. A014609.

%K nonn

%O 0,3

%A _R. H. Hardin_, May 06 2010

%E a(0), a(8) from _Alois P. Heinz_, Jan 19 2016