%I #5 Mar 31 2012 12:36:20
%S 1,16924,403365340,11922480289932,407090790228102102,
%T 15381627927280923953894,626076436927654841850687690,
%U 26973009375096737119981280672009,1215269783462969270931217890768937234
%N Number of permutations of n copies of 1..8 introduced in order 1..8 with no element equal to another within a distance of 4
%H R. H. Hardin, <a href="/A190935/b190935.txt">Table of n, a(n) for n = 1..11</a>
%e Some solutions for n=2
%e ..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1
%e ..2....2....2....2....2....2....2....2....2....2....2....2....2....2....2....2
%e ..3....3....3....3....3....3....3....3....3....3....3....3....3....3....3....3
%e ..4....4....4....4....4....4....4....4....4....4....4....4....4....4....4....4
%e ..5....5....5....5....5....5....5....5....5....5....5....5....5....5....5....5
%e ..6....6....6....6....6....6....6....6....6....6....6....6....1....6....6....6
%e ..7....7....2....7....7....7....7....7....7....1....7....7....6....7....7....1
%e ..8....1....7....8....8....2....8....3....1....7....1....2....7....3....2....7
%e ..1....4....8....4....2....8....1....8....8....3....4....4....8....4....8....2
%e ..5....8....3....3....5....3....3....2....4....8....3....8....5....1....4....8
%e ..4....2....5....2....4....6....2....1....6....6....8....5....2....8....6....4
%e ..7....3....6....7....1....4....6....4....3....2....5....7....4....5....1....3
%e ..3....6....4....5....3....5....4....5....5....7....6....3....6....2....3....5
%e ..2....5....8....1....7....1....5....8....8....4....2....1....7....6....8....6
%e ..6....8....1....8....8....8....7....7....7....8....7....6....3....7....5....7
%e ..8....7....7....6....6....7....8....6....2....5....8....8....8....8....7....8
%K nonn
%O 1,2
%A _R. H. Hardin_ May 23 2011