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Number of 4Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally
1

%I #5 Mar 31 2012 12:36:16

%S 15,225,3375,35656,372850,3833322,39048081,395408137,3984364191,

%T 40031462211,401659633507,4025118368372,40315220042932,

%U 403641830599161,4040392891662855,40438586707202572,404700496922543129

%N Number of 4Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

%C Row 4 of A189905

%H R. H. Hardin, <a href="/A189906/b189906.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ May 01 2011