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A232138 Number of (1+1) X (n+1) 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.

%I A232138 #8 Oct 03 2018 08:53:46
%S A232138 6,36,200,1140,6468,36752,208772,1186044,6737864,38277700,217454804,
%T A232138 1235356496,7018035732,39869322348,226496831848,1286724024020,
%U A232138 7309853741220,41527134586384,235914830581476,1340227488431516
%N A232138 Number of (1+1) X (n+1) 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.
%H A232138 R. H. Hardin, <a href="/A232138/b232138.txt">Table of n, a(n) for n = 1..210</a>
%F A232138 Empirical: a(n) = 6*a(n-1) - 11*a(n-3) + 4*a(n-4).
%F A232138 Empirical g.f.: 2*x*(3 - 8*x^2 + 3*x^3) / (1 - 6*x + 11*x^3 - 4*x^4). - _Colin Barker_, Oct 03 2018
%e A232138 Some solutions for n=6:
%e A232138 ..0..1..2..0..2..1..0....0..1..0..1..2..0..1....0..1..2..2..0..1..0
%e A232138 ..2..1..1..2..1..2..1....2..0..1..0..1..0..1....2..0..0..1..2..2..1
%Y A232138 Row 1 of A232137.
%K A232138 nonn
%O A232138 1,1
%A A232138 _R. H. Hardin_, Nov 19 2013