A181035 - OEIS

%I #3 Mar 31 2012 12:35:49

%S 1,13,239,10897,1095851,250916131,129422885699,150985649174085,

%T 397743903151933881,2367568471466798904283,31835463913062005686452609,

%U 967121732734103600475330208107,66372797708066134019183673485369717

%N Number of nX(n+4) binary matrices with no initial bit string in any row or column divisible by 4

%C Superdiagonal 4 of A181031

%H R. H. Hardin, <a href="/A181035/b181035.txt">Table of n, a(n) for n=1..22</a>

%e Some solutions for 4X8

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Sep 30 2010