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%I #6 Apr 13 2022 19:46:08
%S 9,41,486,4287,41165,385632,3638773,34262775,322817734,3040984385,
%T 28647966717,269877546432,2542386946921,23950576862273,
%U 225626690048980,2125518640310461,20023471678068295,188631332893572912
%N Number of (n+1) X (2+1) 0..2 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..2 introduced in row major order.
%C Column 2 of A238912.
%H R. H. Hardin, <a href="/A238907/b238907.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 6*a(n-1) +32*a(n-2) +8*a(n-3) -51*a(n-4) -43*a(n-5) -5*a(n-6) +37*a(n-7) -5*a(n-8) -2*a(n-9) +4*a(n-10).
%e Some solutions for n=5
%e ..0..1..0....0..1..2....0..1..0....0..1..2....0..1..2....0..1..0....0..1..2
%e ..2..0..2....2..0..1....2..0..1....1..2..1....1..0..1....1..0..1....1..0..1
%e ..2..0..2....1..2..0....0..1..0....2..1..0....1..2..0....0..2..0....1..2..1
%e ..0..2..0....1..0..2....2..0..2....1..2..0....0..1..2....2..0..2....2..0..2
%e ..0..2..1....0..2..1....1..2..1....2..0..1....0..1..2....1..2..0....1..0..2
%e ..2..0..2....1..0..2....0..1..0....0..1..0....2..0..1....2..0..1....0..2..1
%Y Cf. A238912.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 07 2014
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