A316798 - OEIS

%I #4 Jul 14 2018 14:49:46

%S 0,18,31,170,792,3759,18897,91138,476043,2434631,12363865,63517567,

%T 326131379,1671754689,8572647264,44017843069,225847266812,

%U 1158829313595,5947763981588,30523170292757,156640465674701,803891068081321

%N Number of nX5 0..1 arrays with every element unequal to 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 5 of A316801.

%H R. H. Hardin, <a href="/A316798/b316798.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316801.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 14 2018