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%I #5 Mar 31 2012 12:37:03
%S 102,1648,36865,1193734,59491439,4356486501,463699765823,
%T 75133672706401
%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order
%C Diagonal of A204867
%e Some solutions for n=3
%e ..0..1..0..1..1....0..1..1..1..1....0..0..0..0..1....0..1..0..1..1
%e ..0..0..1..1..0....1..1..0..0..0....1..0..1..1..1....0..1..1..0..0
%e ..0..0..1..1..0....1..1..0..0..1....1..0..1..1..0....0..1..0..0..0
%e ..1..0..1..0..0....0..1..1..0..1....1..0..0..0..0....0..1..1..1..0
%e ..0..0..1..1..0....0..1..1..0..1....0..0..0..1..1....1..1..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 20 2012
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