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A205412 Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.

%I A205412 #6 Jul 22 2025 18:50:48
%S A205412 1820215,64878898,2553087985,67792717447,2520131261396,98445276297551,
%T A205412 3148208484619590,113563473572336662,4281011039064902788
%N A205412 Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.
%C A205412 Column 5 of A205415
%e A205412 Some solutions for n=3
%e A205412 ..0..1..0..1..2..2..0....0..0..0..0..1..1..1....0..0..0..0..1..0..1
%e A205412 ..2..2..2..2..2..2..2....0..1..2..0..2..2..0....1..0..1..1..1..2..2
%e A205412 ..0..0..0..0..0..0..0....0..2..1..0..0..0..0....2..0..2..1..1..1..1
%e A205412 ..2..2..1..0..2..0..1....0..0..0..0..0..1..0....0..0..0..0..0..0..0
%e A205412 ..1..1..1..1..0..0..1....1..1..0..0..2..1..0....0..0..2..2..2..1..2
%K A205412 nonn
%O A205412 1,1
%A A205412 _R. H. Hardin_ Jan 26 2012