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%I #5 Mar 31 2012 12:36:20
%S 1,40,1744,79944,3791001,184877712,9230302913,470167308382,
%T 24367956213267,1282234744431834,68376498305017644,
%U 3689492332817242036,201174991614802295504,11072289690651114833968,614516844070147078701721
%N Number of permutations of n copies of 1..6 introduced in order 1..6 with no element equal to another within a distance of 4
%H R. H. Hardin, <a href="/A190926/b190926.txt">Table of n, a(n) for n = 1..37</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....1....1....6....6....6....1....6....6....6....6....6....6....6
%e ..2....2....1....6....6....1....1....1....6....1....2....1....2....2....1....2
%e ..1....1....3....3....3....3....2....3....2....3....3....2....3....3....2....3
%e ..4....4....4....2....2....2....3....4....3....2....4....4....1....4....3....4
%e ..5....5....2....4....5....4....5....5....4....5....1....5....4....5....4....5
%e ..3....6....5....5....4....5....4....6....5....6....5....6....5....6....5....1
%e ..6....3....6....6....6....6....6....2....6....4....6....3....6....1....6....6
%K nonn
%O 1,2
%A _R. H. Hardin_ May 23 2011
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