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%I #5 Mar 31 2012 12:36:00
%S 3,7,26,91,334,1212,4496,16809,63442,240728,918208,3516450,13515164,
%T 52099024,201356496,779967713,3027239338,11769964920,45833102224,
%U 178726147558,697817190692,2727647007504,10672911447056,41801025679450
%N Half the number of (n+1)X2 binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks
%C Column 1 of A184467
%H R. H. Hardin, <a href="/A184459/b184459.txt">Table of n, a(n) for n = 1..200</a>
%e All solutions for 3X2
%e ..0..0....0..0....0..0....0..1....0..1....0..1....0..1
%e ..1..1....0..1....1..0....1..0....1..0....0..1....0..1
%e ..0..0....1..1....1..1....1..0....0..1....1..0....0..1
%e ...
%e ...E.......M.......M.......E.......E.......E.......E...
%e ...E.......P.......P.......E.......E.......E.......E...
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 15 2011
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