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%I #6 Dec 18 2015 18:17:56
%S 4,184,143028,1960824272,443471777729100
%N Number of n X n 0..3 arrays with adjacent row and column sums unequal
%C Diagonal of A202636
%e Some solutions for n=3
%e ..2..0..3....0..1..0....0..1..0....2..3..2....2..0..0....0..2..3....3..2..1
%e ..1..0..3....1..3..1....2..0..0....3..0..2....3..2..3....2..2..2....2..2..3
%e ..0..2..0....2..0..0....2..2..2....3..2..2....2..2..0....0..0..2....1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 21 2011