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A208692 Number of 6 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.

%I A208692 #8 Jul 05 2018 13:54:50
%S A208692 21,441,1113,11067,41013,301035,1346961,8556723,42184905,249260739,
%T A208692 1292345649,7358809899,39164938617,218805732243,1180444035057,
%U A208692 6530395532955,35479909625769,195286010577987,1064871399311265
%N A208692 Number of 6 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
%C A208692 Row 6 of A208688.
%H A208692 R. H. Hardin, <a href="/A208692/b208692.txt">Table of n, a(n) for n = 1..210</a>
%F A208692 Empirical: a(n) = a(n-1) + 26*a(n-2) + 6*a(n-3) - 78*a(n-4).
%F A208692 Empirical g.f.: 21*x*(1 + 20*x + 6*x^2 - 78*x^3) / (1 - x - 26*x^2 - 6*x^3 + 78*x^4). - _Colin Barker_, Jul 05 2018
%e A208692 Some solutions for n=4:
%e A208692 ..0..1..0..1....0..1..1..0....1..0..1..1....1..1..0..1....1..1..1..1
%e A208692 ..1..1..0..0....1..1..1..1....1..1..1..1....0..1..0..1....0..1..0..0
%e A208692 ..0..1..0..0....0..1..1..0....1..0..1..1....0..1..0..1....0..1..0..0
%e A208692 ..0..1..1..0....0..1..0..0....1..0..1..0....0..1..0..1....0..1..1..1
%e A208692 ..0..1..0..0....0..1..0..0....1..0..1..0....1..1..1..1....1..1..0..0
%e A208692 ..1..1..0..1....0..1..0..0....1..1..1..0....0..1..0..0....0..1..0..0
%Y A208692 Cf. A208688.
%K A208692 nonn
%O A208692 1,1
%A A208692 _R. H. Hardin_, Mar 01 2012