%I #4 Jan 14 2013 05:23:57
%S 0,0,40,15181,1829388,229338911,25415184702,2810579281184,
%T 304942133485122,32982395377267648,3554547354934938568,
%U 382579389710396900732,41139562348362648154196,4421834681716006875081205
%N Number of 5Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2
%C Row 5 of A221388
%H R. H. Hardin, <a href="/A221391/b221391.txt">Table of n, a(n) for n = 1..17</a>
%e Some solutions for n=3
%e ..0..2..1....0..2..1....0..2..1....0..2..0....0..2..1....0..2..1....0..2..1
%e ..0..2..0....0..2..1....1..2..1....1..2..1....0..2..1....0..2..1....1..2..1
%e ..1..2..1....1..2..1....0..2..1....1..2..1....1..2..1....0..2..1....0..2..0
%e ..1..2..0....0..2..0....0..2..1....0..2..1....0..2..1....0..2..1....1..2..0
%e ..1..2..0....1..2..0....0..2..0....0..2..0....0..2..0....1..2..0....1..2..0
%K nonn
%O 1,3
%A _R. H. Hardin_ Jan 14 2013
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