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Number of nX(n+2) binary matrices with no initial bit string in any row or column divisible by 4
1

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

%S 1,5,41,827,36787,3729091,851302029,439621976195,512615852515459,

%T 1350668111471923517,8039144604242883698707,

%U 108102244692016476122031505,3283958267007000189206675439393,225377046019121585326666765445484971

%N Number of nX(n+2) binary matrices with no initial bit string in any row or column divisible by 4

%C Superdiagonal 2 of A181031

%H R. H. Hardin, <a href="/A181033/b181033.txt">Table of n, a(n) for n=1..22</a>

%e Some solutions for 4X6

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Sep 30 2010