A304301 - OEIS

%I #4 May 10 2018 09:02:26

%S 8,22,22,43,339,685,2673,11690,31390,133744,470762,1540068,6102146,

%T 20842217,73878439,275427095,956546292,3458032571,12531328029,

%U 44267349424,160026929357,574345404117,2048047347778,7378617219463

%N Number of nX7 0..1 arrays with every element unequal to 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304302.

%H R. H. Hardin, <a href="/A304301/b304301.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..0..1..0..0..0..0..0. .0..0..0..0..0..0..0. .0..0..0..1..0..1..0

%e ..0..0..0..1..0..0..1. .1..0..0..1..0..1..0. .1..0..0..0..0..0..0

%e ..1..0..0..0..0..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..1

%e ..0..0..0..0..0..0..1. .0..1..0..0..0..0..1. .1..0..0..1..0..0..0

%e ..0..1..0..0..1..0..0. .0..0..0..0..1..0..0. .0..0..0..0..0..1..0

%Y Cf. A304302.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 10 2018