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Half the number of nX7 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors
2

%I #5 Mar 31 2012 12:35:50

%S 8,22,205,1798,19899,206755,2160250,22504107,234636215,2447317278,

%T 25539919635,266563403686,2782185688787,29038350922976,

%U 303075629656107,3163217395827118,33014647369487612,344575588242732515

%N Half the number of nX7 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors

%C Column 7 of A183312

%H R. H. Hardin, <a href="/A183308/b183308.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions with a(1,1)=0 for 7X4

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 03 2011