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%I #9 Oct 20 2023 15:06:48
%S 4,11,33,98,291,865,2570,7637,22693,67432,200373,595405,1769236,
%T 5257255,15621845,46420050,137936399,409875693,1217938738,3619084505,
%U 10754048825,31955475472,94955158681,282157659273,838426745764,2491370993875
%N Number of nX2 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors.
%C Column 2 of A282996, A295275.
%H R. H. Hardin, <a href="/A282990/b282990.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 2*a(n-1) +3*a(n-2) -a(n-4).
%F Empirical: G.f.: -x*(-4-3*x+x^2+x^3)/(1-2*x-3*x^2+x^4) . - _R. J. Mathar_, Mar 02 2017
%e Some solutions for n=5
%e ..0..0. .1..1. .1..0. .0..0. .1..1. .1..0. .0..1. .1..0. .1..0. .0..0
%e ..0..1. .0..0. .1..0. .1..0. .0..0. .0..0. .1..0. .1..0. .0..0. .0..1
%e ..1..0. .0..0. .0..1. .0..0. .0..0. .0..1. .0..0. .0..0. .0..0. .0..0
%e ..0..1. .0..0. .1..0. .1..0. .0..0. .0..0. .0..0. .0..0. .0..1. .0..0
%e ..0..0. .0..0. .0..0. .1..0. .1..1. .0..1. .0..0. .1..1. .1..0. .1..1
%Y Cf. A282996, A295275.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 26 2017
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