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%I #3 Sep 11 2015 13:32:07
%S 23,83,2802,8086,218493,716874,35791690,142423172
%N Number of (n+1)X(3+1) 0..2 arrays with each row and column prime, read as a base 3 number with top and left being the most significant digits.
%C Column 3 of A262122.
%e Some solutions for n=4
%e ..0..2..0..1....0..2..0..1....2..1..1..1....2..1..2..2....0..0..1..2
%e ..0..0..0..2....0..0..0..2....0..1..1..1....2..1..2..2....1..0..0..2
%e ..1..0..1..1....0..0..2..1....0..0..0..2....0..0..0..2....2..2..0..1
%e ..0..1..2..2....1..1..0..1....0..0..1..0....2..0..2..1....0..0..0..2
%e ..2..2..2..1....0..2..1..2....1..1..2..1....1..1..1..2....2..1..2..2
%Y Cf. A262122.
%K nonn
%O 1,1
%A _R. H. Hardin_, Sep 11 2015