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%I #5 Mar 31 2012 12:37:30
%S 50987,8743851,1569132907,299013108267,57996585929227,
%T 11360964645748987,2236023641962912731,441217186235837857275,
%U 87185885989797413867867,17242469799670707579743515,3411677740542012016899044731
%N Number of (n+1)X7 0..3 arrays with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order
%C Column 6 of A209848
%H R. H. Hardin, <a href="/A209846/b209846.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..0..1..0..1..2....0..0..1..1..0..0..1....0..0..1..0..0..0..2
%e ..2..0..0..0..0..1..1....0..1..0..0..0..1..0....2..0..0..1..0..2..0
%e ..2..2..2..2..0..1..0....1..1..0..1..0..0..0....2..2..0..1..0..0..2
%e ..0..2..3..2..0..1..1....0..1..0..1..1..1..0....2..2..0..1..0..0..2
%e ..0..2..2..2..0..0..1....0..1..0..0..0..0..0....0..2..0..0..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 14 2012
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