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%I #6 Dec 18 2015 18:18:04
%S 1,10,9089,3038188519,955922762706415420,
%T 584640904301741699504623887947
%N Number of n X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any antidiagonal neighbor (colorings ignoring permutations of colors)
%C Diagonal of A208788
%e Some solutions for n=4
%e ..0..1..0..0....0..0..1..2....0..0..0..0....0..0..0..0....0..0..1..2
%e ..0..1..1..1....1..0..0..0....1..2..1..0....1..1..1..0....1..0..0..0
%e ..0..2..0..0....1..1..1..0....3..0..1..0....0..2..1..0....1..1..1..0
%e ..0..1..1..0....0..2..1..0....1..0..1..0....0..0..1..0....2..0..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 01 2012
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