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%I #5 Mar 31 2012 12:36:00
%S 334,12324,616534,33787978,1925704384,112210745828,6636592203096,
%T 396770571117114,23916105558978568,1450886078150900726,
%U 88476176169893590874,5418407297450835597284,333018547198651616447064
%N Half the number of (n+1)X6 binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks
%C Column 5 of A184467
%H R. H. Hardin, <a href="/A184463/b184463.txt">Table of n, a(n) for n = 1..75</a>
%e Some solutions for 3X6
%e ..0..1..0..0..0..1....0..1..1..1..1..1....0..0..1..1..1..0....0..1..1..0..1..0
%e ..0..0..1..1..0..1....1..1..0..0..0..0....1..1..0..0..0..1....0..1..1..0..0..0
%e ..0..1..1..1..1..0....1..1..0..0..1..0....1..1..0..0..1..1....1..0..1..1..1..0
%e ...
%e ...M..E..E..M..E.......P..P..E..E..E.......E..E..E..E..E.......E..P..E..M..M...
%e ...M..P..P..P..E.......P..E..M..M..M.......P..E..M..M..P.......E..P..P..E..M...
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 15 2011