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A281768 Number of 4Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

%I A281768 #4 Jan 29 2017 12:43:04
%S A281768 0,20,90,560,2808,13968,68362,323280,1529974,7114300,32915192,
%T A281768 151142772,689726508,3133687480,14169310798,63838844556,286639424578,
%U A281768 1283124275056,5728711606322,25513799290264,113382456085042,502859346935932
%N A281768 Number of 4Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
%C A281768 Row 4 of A281765.
%H A281768 R. H. Hardin, <a href="/A281768/b281768.txt">Table of n, a(n) for n = 1..210</a>
%e A281768 Some solutions for n=4
%e A281768 ..0..0..0..0. .0..1..0..1. .0..0..1..1. .0..0..0..0. .0..0..1..0
%e A281768 ..0..1..1..1. .0..0..1..0. .0..1..0..1. .1..1..0..0. .0..1..1..1
%e A281768 ..1..1..1..1. .0..0..0..1. .0..0..1..0. .1..1..0..0. .0..0..1..1
%e A281768 ..1..1..1..1. .0..0..1..1. .0..0..0..1. .1..1..0..0. .0..0..0..1
%Y A281768 Cf. A281765.
%K A281768 nonn
%O A281768 1,2
%A A281768 _R. H. Hardin_, Jan 29 2017