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%I #4 Mar 31 2012 12:37:01
%S 0,776,164112,38262132,17549848472,5589659640640,2168622256129656,
%T 749141388620048272,283903844662926128576,102514076157660926553040
%N Number of nX7 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order
%C Column 7 of A204301
%e Some solutions for n=3
%e ..0..0..1..0..2..1..1....1..1..2..1..0..1..1....0..0..1..0..0..0..1
%e ..1..0..1..0..0..0..0....0..0..0..1..0..3..0....1..1..1..0..1..1..1
%e ..1..0..1..2..1..1..0....1..1..0..1..1..1..0....0..0..1..0..0..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 14 2012
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