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Number of nX5 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns
1

%I #4 Jan 26 2013 05:55:46

%S 0,112,470,26770,291016,8348792,128392912,2902283642,51249757660,

%T 1057112321675,19743642679950,392701939735569,7503512799161496,

%U 147078276950393993,2836406566579942784,55269364154475476649

%N Number of nX5 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns

%C Column 5 of A221800

%H R. H. Hardin, <a href="/A221798/b221798.txt">Table of n, a(n) for n = 1..21</a>

%e Some solutions for n=3

%e ..0..1..1..1..1....0..1..1..1..1....0..1..1..0..1....1..1..1..1..1

%e ..2..2..1..2..1....2..2..1..1..2....2..2..1..1..2....0..1..1..1..1

%e ..0..1..1..1..0....0..1..1..0..1....0..1..1..1..1....1..2..1..2..0

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 26 2013