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A183308 Half the number of nX7 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.

%I A183308 #7 Jul 22 2025 08:48:12
%S A183308 8,22,205,1798,19899,206755,2160250,22504107,234636215,2447317278,
%T A183308 25539919635,266563403686,2782185688787,29038350922976,
%U A183308 303075629656107,3163217395827118,33014647369487612,344575588242732515
%N A183308 Half the number of nX7 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.
%C A183308 Column 7 of A183312
%H A183308 R. H. Hardin, <a href="/A183308/b183308.txt">Table of n, a(n) for n = 1..200</a>
%e A183308 Some solutions with a(1,1)=0 for 7X4
%e A183308 ..0..1..0..1....0..1..0..1....0..0..1..0....0..1..0..1....0..1..0..1
%e A183308 ..1..0..0..1....1..0..1..0....1..1..0..1....0..1..0..1....0..1..0..1
%e A183308 ..1..0..1..0....1..0..1..0....0..1..0..1....1..0..1..0....1..1..0..0
%e A183308 ..0..1..0..1....0..1..0..1....1..0..1..0....0..1..1..0....0..0..1..1
%e A183308 ..0..1..0..0....1..1..0..1....0..1..0..1....0..1..0..1....1..1..0..0
%e A183308 ..1..0..1..1....0..0..1..0....1..1..0..0....1..0..0..1....0..1..0..1
%e A183308 ..1..0..1..0....1..0..1..0....0..0..1..1....0..1..1..0....1..0..1..0
%K A183308 nonn
%O A183308 1,1
%A A183308 _R. H. Hardin_ Jan 03 2011