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%I #5 Mar 31 2012 12:37:14
%S 7,49,230,1011,4705,22412,105936,497727,2339729,11013295,51846666,
%T 244013222,1148355280,5404522372,25435928407,119711433603,
%U 563405871570,2651594982047,12479394172896,58732688555813,276417903263710
%N Number of nX3 0..1 arrays avoiding 0 1 0 horizontally and 1 0 1 vertically
%C Column 3 of A206883
%H R. H. Hardin, <a href="/A206878/b206878.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 5*a(n-1) -7*a(n-2) +24*a(n-3) +8*a(n-4) +11*a(n-5) +32*a(n-6) -22*a(n-7) -44*a(n-8) +11*a(n-9) +13*a(n-10) -a(n-11) -a(n-12)
%e Some solutions for n=4
%e ..1..0..1....1..1..1....0..1..1....0..1..1....1..0..0....1..0..0....0..0..1
%e ..0..0..1....1..1..1....0..0..1....0..0..1....0..0..1....0..0..0....0..0..0
%e ..0..1..1....0..1..1....0..0..1....1..0..0....0..0..1....0..1..1....1..1..0
%e ..1..0..0....0..1..1....0..0..1....0..0..0....0..1..1....1..1..0....0..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 13 2012
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