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%I #5 Dec 18 2015 18:17:42
%S 0,2,10,212,9201,1236536,391565294,316110683652,658828649763119,
%T 3543427279193946969,48701064645083867200925
%N Number of n X n symmetric 0..3 arrays with each element equal to the product mod 4 of two of its horizontal and vertical neighbors
%e Some solutions for 4X4
%e ..1..1..2..2....0..0..1..1....0..0..3..1....0..0..2..2....1..1..3..1
%e ..1..1..3..3....0..0..1..1....0..1..3..3....0..1..3..3....1..1..3..3
%e ..2..3..1..1....1..1..1..1....3..3..2..2....2..3..3..1....3..3..0..0
%e ..2..3..1..1....1..1..1..1....1..3..2..0....2..3..1..1....1..3..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jul 27 2011
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