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Number of 5Xn 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
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%I #4 Dec 16 2016 11:49:03

%S 0,2232,549608,113887852,20868369045,3484404510555,548662535504065,

%T 82669943798156117,12049285468552520957,1710840847756519362993,

%U 237848597864301016766795,32497700300007970516574682

%N Number of 5Xn 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%C Row 5 of A279657.

%H R. H. Hardin, <a href="/A279661/b279661.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=2

%e ..0..1. .0..0. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1. .0..0. .0..0

%e ..1..1. .1..0. .0..1. .2..1. .1..2. .2..0. .1..1. .2..1. .1..2. .1..1

%e ..0..2. .0..1. .0..0. .2..1. .0..1. .0..2. .1..0. .1..2. .1..0. .1..0

%e ..0..0. .1..1. .0..0. .0..1. .1..2. .2..1. .1..0. .0..1. .0..0. .2..2

%e ..0..1. .2..1. .2..0. .1..1. .2..2. .1..1. .0..1. .1..1. .1..0. .1..2

%Y Cf. A279657.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 16 2016