%I
%S 5,50,500,3143,18432,98438,508681,2560344,12721832,62688891,307514468,
%T 1504686646,7352965785,35912894408,175383062746,856630710989,
%U 4185293733440,20456112775414,100023287817835,489294036823648
%N Number of n X 4 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in rowmajor sequential order.
%C Column 4 of A267667.
%H R. H. Hardin, <a href="/A267663/b267663.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A267663/a267663.txt">Empirical recurrence of order 80</a>
%F Empirical recurrence of order 80 (see link above).
%e Some solutions for n=6
%e ..0..1..0..0....0..0..1..1....0..1..0..0....0..1..0..0....0..0..1..0
%e ..0..1..0..0....1..0..1..0....0..1..1..0....1..0..0..1....1..0..1..1
%e ..0..1..0..0....1..0..1..1....1..0..1..0....1..1..0..0....0..1..1..0
%e ..0..0..1..0....1..1..0..1....0..1..0..0....0..1..0..1....1..0..1..1
%e ..1..1..0..1....0..0..1..1....0..0..1..0....1..1..0..1....1..0..1..0
%e ..0..1..1..0....1..0..0..1....0..1..0..0....0..0..1..1....1..1..0..1
%Y Cf. A267667.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 19 2016
