%I #6 Dec 18 2015 18:17:49
%S 1,9,34,627,16890,1276986,209785488,84453386767,71088592371829
%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 2,0,1,1,1 for x=0,1,2,3,4
%C Every 0 is next to 0 2's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
%C Diagonal of A197280
%e Some solutions containing all values 0 to 4 for n=4
%e ..1..0..1..2....0..1..1..0....1..3..1..0....2..1..0..1....1..0..1..2
%e ..1..1..4..1....1..4..1..0....0..1..4..1....1..4..1..3....3..1..4..1
%e ..0..1..1..0....3..1..4..1....1..4..1..1....0..1..4..1....1..4..1..0
%e ..0..1..3..1....1..0..1..2....2..1..0..0....0..1..1..0....0..1..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Oct 12 2011