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A196857
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Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,4,2,0,1 for x=0,1,2,3,4
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%I #6 Dec 18 2015 18:17:48
%S 1,2,7,35,473,11280,494579,44461736,7927841482,2782301025984,
%T 1928382976203757
%N Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,4,2,0,1 for x=0,1,2,3,4
%C Every 0 is next to 0 3's, every 1 is next to 1 4's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 1's
%C Diagonal of A196863
%e Some solutions for n=4
%e ..0..0..2..2....2..2..2..0....2..2..2..0....2..2..2..2....0..0..1..0
%e ..0..0..2..2....2..0..2..2....2..0..2..2....2..0..0..2....0..1..4..1
%e ..0..0..0..0....2..2..0..2....2..0..0..2....2..0..2..2....2..2..1..0
%e ..0..0..0..0....0..2..2..2....2..2..2..2....2..2..2..0....2..2..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Oct 06 2011
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