%I #5 Dec 18 2015 18:18:40
%S 1,3,45,4743,3801411,23938685973,1215663478473627
%N Number of n X n 0..2 zero-diagonal arrays with corresponding row and column sums equal
%C Column 2 of A229417
%e Some solutions for n=4
%e ..0..1..2..1....0..1..2..0....0..0..2..0....0..1..1..2....0..2..0..1
%e ..2..0..2..0....2..0..0..0....2..0..1..0....0..0..2..0....2..0..0..1
%e ..0..2..0..2....0..1..0..1....0..2..0..1....2..1..0..2....0..1..0..0
%e ..2..1..0..0....1..0..0..0....0..1..0..0....2..0..2..0....1..0..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Sep 22 2013