%I
%S 0,15,583,95101,63868351,177385265619,2043774880960645,
%T 97587614786720584857
%N Number of n X n 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors
%C Diagonal of A183554
%e Some solutions for 3X3
%e ..1..1..1....0..1..1....1..1..1....1..1..1....2..0..0....1..1..1....0..0..0
%e ..1..1..0....0..0..1....1..1..1....2..2..1....2..2..0....1..0..0....0..0..2
%e ..1..1..0....0..0..1....1..0..0....0..0..1....1..1..1....0..0..0....2..2..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 05 2011
