|
%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
|
