A316551 - OEIS

%I #4 Jul 06 2018 12:34:40

%S 21,127,129,430,1568,5265,18978,73409,276005,1055277,4099795,16069541,

%T 63171437,248867713,983343967,3892240605,15417744510,61119390728,

%U 242448097787,962127592502,3818962311133,15161489223289,60200972419537

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A316552.

%H R. H. Hardin, <a href="/A316551/b316551.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316552.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 06 2018