%I
%S 187,506493,1496307201,4422202024212,13069424064243420,
%T 38625516979536823947,114154269785454920027391,
%U 337372761040287875038964700,997075099388051313174129747636
%N Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors
%C Column 6 of A208175
%H R. H. Hardin, <a href="/A208173/b208173.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..1..0..0..0....0..1..0..0..1..0....0..0..0..1..0..2....0..0..0..0..1..1
%e ..0..1..2..1..1..3....1..0..2..3..1..3....2..0..1..3..2..0....2..0..2..2..1..0
%e ..3..3..2..0..0..2....2..2..1..1..3..2....0..1..0..1..0..1....3..2..3..0..2..3
%e ..1..1..3..1..0..0....0..1..0..3..0..1....3..3..3..2..3..0....3..0..1..2..3..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 24 2012
