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A281808 Number of 7 X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%I A281808 #6 Feb 22 2025 17:07:19
%S A281808 0,400,5191,117401,1770697,28237876,436154254,6282549989,91589152155,
%T A281808 1288443030127,17891751065943,246129086382234,3333215777163938,
%U A281808 44817385604532614,597117631739752174,7892791183495285965
%N A281808 Number of 7 X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
%C A281808 Row 7 of A281802.
%H A281808 R. H. Hardin, <a href="/A281808/b281808.txt">Table of n, a(n) for n = 1..210</a>
%e A281808 Some solutions for n=4
%e A281808 ..0..1..0..0. .0..0..0..0. .0..0..1..1. .0..0..0..0. .0..0..1..1
%e A281808 ..1..0..0..0. .0..0..0..0. .0..0..1..1. .0..0..0..0. .0..1..0..1
%e A281808 ..0..1..0..0. .0..0..1..1. .1..0..0..1. .0..0..0..0. .1..0..1..1
%e A281808 ..0..0..0..0. .1..1..1..0. .1..1..0..0. .1..0..0..0. .0..1..1..0
%e A281808 ..0..0..0..0. .1..1..0..0. .1..1..0..0. .1..0..0..0. .1..0..1..1
%e A281808 ..1..1..0..0. .1..0..0..0. .1..1..0..0. .0..1..1..1. .0..1..0..0
%e A281808 ..1..1..1..1. .0..1..1..1. .1..1..1..0. .0..0..1..1. .1..0..0..0
%Y A281808 Cf. A281802.
%K A281808 nonn
%O A281808 1,2
%A A281808 _R. H. Hardin_, Jan 30 2017