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%I #5 Dec 18 2015 18:18:25
%S 1,21,4872,16436223,723234356389,429398881440049645
%N Number of n X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor
%C Diagonal of A221125
%e Some solutions for n=3
%e ..1..0..1....1..1..3....2..0..0....1..1..0....0..3..0....1..0..3....2..0..1
%e ..0..2..1....0..1..0....1..4..0....1..1..3....1..0..2....0..2..1....0..4..0
%e ..3..0..1....1..1..1....0..0..2....1..1..0....0..1..2....0..2..0....0..0..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 02 2013
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