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A279980 Number of 4Xn 0..1 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.

%I A279980 #5 Dec 24 2016 08:39:04
%S A279980 0,31,296,1922,10491,50690,226771,963728,3941732,15655280,60749739,
%T A279980 231325874,867192006,3208394065,11737643962,42526452550,152777627539,
%U A279980 544782076812,1929805835927,6795769111934,23804414728200,82983605105905
%N A279980 Number of 4Xn 0..1 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 A279980 Row 4 of A279977.
%H A279980 R. H. Hardin, <a href="/A279980/b279980.txt">Table of n, a(n) for n = 1..210</a>
%H A279980 R. H. Hardin, <a href="/A279980/a279980.txt">Empirical recurrence of order 68</a>
%F A279980 Empirical recurrence of order 68 (see link above)
%e A279980 Some solutions for n=4
%e A279980 ..0..0..1..0. .0..1..1..0. .0..1..0..1. .0..1..1..0. .0..1..0..0
%e A279980 ..1..0..0..1. .1..0..1..1. .1..0..1..0. .1..0..1..1. .0..1..0..1
%e A279980 ..0..1..1..0. .1..0..0..1. .0..0..1..0. .1..1..0..0. .0..0..1..0
%e A279980 ..0..0..1..1. .1..1..0..0. .1..0..0..1. .1..0..1..0. .1..1..0..1
%Y A279980 Cf. A279977.
%K A279980 nonn
%O A279980 1,2
%A A279980 _R. H. Hardin_, Dec 24 2016