%I #6 Dec 18 2015 18:17:32
%S 1,9,256,62694,16777215
%N Half the number of n X n 0..2 arrays with no element equal its row sum plus its column sum mod 3
%C Diagonal of A183429
%e Some solutions for 4X4
%e ..2..0..0..1....1..0..0..1....0..1..0..0....0..0..2..0....0..0..1..0
%e ..0..0..1..0....2..1..1..2....0..1..1..2....1..0..1..0....1..0..0..2
%e ..2..0..2..0....0..0..0..0....0..0..1..0....0..1..1..2....2..0..2..2
%e ..2..1..2..2....1..1..1..1....0..2..2..1....2..1..0..0....0..1..1..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 04 2011
|