|
%I #6 Dec 18 2015 18:17:49
%S 1,2,11,167,4005,238206,30771790,8790242932,5613820818788,
%T 8031626024398536
%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 3,3,2,1,2 for x=0,1,2,3,4
%C Every 0 is next to 0 3's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 2's
%C Diagonal of A197342
%e Some solutions for n=4
%e ..0..0..0..0....0..0..0..0....0..0..0..1....2..2..2..2....0..1..3..1
%e ..2..2..2..0....2..2..0..1....1..0..1..3....2..0..0..2....1..0..1..0
%e ..2..0..2..0....2..2..1..3....3..1..1..1....2..2..0..2....3..1..2..2
%e ..2..2..2..0....0..0..0..1....1..1..3..1....0..2..2..2....1..0..2..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Oct 13 2011
| 