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%I #4 Jun 18 2018 07:36:51
%S 8,49,142,458,1962,6604,22446,86464,311891,1100642,4051876,14751188,
%T 52994208,192694281,700643032,2533737542,9188792804,33358655064,
%U 120883510481,438255796512,1589816384928,5764235810314,20899418376356
%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.
%C Column 4 of A306053.
%H R. H. Hardin, <a href="/A306049/b306049.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 7*a(n-1) -17*a(n-2) +39*a(n-3) -133*a(n-4) +234*a(n-5) -178*a(n-6) +296*a(n-7) -581*a(n-8) +168*a(n-9) +290*a(n-10) +137*a(n-11) -67*a(n-12) -620*a(n-13) +433*a(n-14) -15*a(n-15) +166*a(n-16) -206*a(n-17) +44*a(n-18) -6*a(n-19) +14*a(n-20) -4*a(n-21) for n>25
%e Some solutions for n=5
%e ..0..1..1..1. .0..1..1..0. .0..0..1..1. .0..0..0..0. .0..0..0..1
%e ..0..1..1..1. .1..0..1..1. .0..0..0..1. .1..1..1..1. .0..1..1..0
%e ..1..0..1..1. .1..1..1..1. .0..0..0..0. .1..1..1..1. .0..0..0..0
%e ..1..0..1..1. .1..0..1..1. .0..0..1..0. .1..0..1..1. .0..0..0..0
%e ..1..1..1..0. .1..0..0..1. .1..0..1..1. .0..1..1..0. .0..0..0..1
%Y Cf. A306053.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jun 18 2018
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