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%I #5 Dec 18 2015 18:18:26
%S 1,17,2008,2460824,26135748494,2568131772343102,
%T 2242286238164144345340,17596650117587793920907469032
%N Number of n X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2
%C Diagonal of A221328
%e Some solutions for n=3
%e ..1..1..2....2..0..1....0..2..0....1..0..2....0..2..1....1..0..1....2..1..0
%e ..0..0..1....1..2..1....1..2..1....1..1..0....2..0..0....1..2..1....2..1..1
%e ..1..1..2....0..2..0....0..1..2....2..1..1....1..2..1....1..2..0....1..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 11 2013
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