A305506 - OEIS

%I #4 Jun 03 2018 13:06:54

%S 0,61,130,1767,13314,101912,855017,6971744,56056227,460027479,

%T 3744369997,30459919249,248461764341,2023970288125,16487763568205,

%U 134364578393651,1094738595047762,8919632329662053,72678409286259667,592172715005066166

%N Number of nX5 0..1 arrays with every element unequal to 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Column 5 of A305509.

%H R. H. Hardin, <a href="/A305506/b305506.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305509.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 03 2018