A190936 - OEIS

%I #5 Mar 31 2012 12:36:20

%S 1,2628,8341096,29584295480,113973074548248,468377213896673183,

%T 2027292282593307983972,9154283191553066456530508,

%U 42808534280820262732168056032,206132516276458610178941094332608

%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 5

%H R. H. Hardin, <a href="/A190936/b190936.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....6....6....6....6

%e ..7....1....7....7....7....7....7....7....7....7....7....7....7....7....7....7

%e ..8....7....2....2....8....1....2....1....8....8....2....8....8....8....8....2

%e ..1....8....8....8....1....8....8....8....1....2....8....3....2....3....2....8

%e ..2....2....3....4....4....2....3....4....3....3....1....2....1....4....3....3

%e ..3....3....4....1....5....4....1....5....4....4....5....5....3....2....5....5

%e ..4....5....6....3....6....5....6....2....2....6....6....4....4....5....6....1

%e ..7....6....5....5....3....6....7....3....5....1....7....6....6....6....4....7

%e ..6....7....1....7....2....7....5....6....8....8....3....1....8....8....8....4

%e ..5....4....7....6....8....3....4....7....7....5....4....7....5....1....1....6

%e ..8....8....8....8....7....8....8....8....6....7....8....8....7....7....7....8

%K nonn

%O 1,2

%A _R. H. Hardin_ May 23 2011