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A279660 Number of 4Xn 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. 1

%I

%S 0,232,20448,1546164,104452983,6415919752,371727892628,20600287800984,

%T 1104065179999916,57631683424913986,2945114091239324182,

%U 147893462582517217145,7318785413508975774938,357709488329762373571289

%N Number of 4Xn 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 4 of A279657.

%H R. H. Hardin, <a href="/A279660/b279660.txt">Table of n, a(n) for n = 1..64</a>

%e Some solutions for n=3

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

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

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

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

%Y Cf. A279657.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 16 2016

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Last modified January 18 21:06 EST 2021. Contains 340262 sequences. (Running on oeis4.)