|
%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
| 