A177302 - OEIS

%I #10 Jan 19 2016 18:22:16

%S 1,1,252,756756,457507512,184619047020,97087382008034,

%T 49254897805981056,22802419346927105088

%N Number of permutations of 5 copies of 1..n with all adjacent differences <= 2 in absolute value.

%C a(n) = (5n)!/120^n for n<=3.

%Y Cf. A014609.

%K nonn,more

%O 0,3

%A _R. H. Hardin_, May 06 2010

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