%I #5 Mar 31 2012 12:35:51

%S 13,368,4003,66012,1140298,17932076,295884064,4899909637,80382466165,

%T 1325242681656,21856484751121,360125243447020,5936723238559184,

%U 97871251587664190,1613326024159412280,26595700362068793612

%N Number of nX7 binary arrays with every element equal to either the sum mod 2 of its vertical neighbors or the sum mod 2 of its horizontal neighbors

%C Column 7 of A183474

%H R. H. Hardin, <a href="/A183472/b183472.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X7

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 05 2011