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%I #5 Mar 31 2012 12:37:06
%S 2768,62716,1448498,33701202,782598960,18167227774,421657055138,
%T 9789425083082,227224401122368,5275018373510432,122445180549684530,
%U 2842463146633784148,65981768963303928002,1531684236219961864660
%N Number of (n+1)X3 0..3 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors
%C Column 2 of A205422
%H R. H. Hardin, <a href="/A205418/b205418.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..1..0....2..0..2....0..0..1....2..1..1....2..0..0....0..1..0....0..1..0
%e ..0..1..0....0..1..2....0..2..3....0..2..1....1..3..0....0..0..1....1..3..2
%e ..0..2..1....3..2..2....2..3..1....0..3..2....2..3..0....2..1..3....3..1..0
%e ..3..0..0....1..2..1....0..3..3....2..2..1....0..2..1....3..0..1....2..2..1
%e ..3..1..1....1..3..2....0..0..0....0..0..1....3..3..2....0..1..2....1..3..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 27 2012
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