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%I #4 Mar 31 2012 12:37:05
%S 677732,25443411,1334713506,60907844595,3053080325738,145542216126349,
%T 7109556887269900,344112922016013626,16763097381054518808
%N Number of (n+1)X7 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors
%C Column 6 of A205246
%e Some solutions for n=4
%e ..2..2..2..1..0..0..1....1..0..1..2..1..0..0....0..0..2..0..1..1..1
%e ..2..0..1..2..0..0..1....2..1..2..2..1..1..2....2..0..1..0..2..0..2
%e ..2..2..1..1..0..1..2....2..0..1..0..1..0..0....0..1..2..0..2..0..0
%e ..1..0..1..1..1..2..0....2..1..2..0..2..0..2....1..2..2..0..0..1..2
%e ..2..2..2..1..0..1..0....2..1..1..0..2..0..0....2..1..1..1..1..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 24 2012