A183320 - OEIS

%I #5 Mar 31 2012 12:35:50

%S 55,523,9767,125103,1872913,25528515,360327392,4963103592,68795107993,

%T 947461430557,13049865962515,179449989707905,2465460224449227,

%U 33861928082629563,464723391441659251,6377980328407833025

%N Number of nX8 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it

%C Column 8 of A183322

%H R. H. Hardin, <a href="/A183320/b183320.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 5X8

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 03 2011