The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #6 Dec 18 2015 18:17:37
%S 2,16,512,37976,8210464,4708773306,6787471566616,25828698626846656,
%T 247502169348575094540,6064620415913633106142608
%N Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally
%C Diagonal of A189161
%e Some solutions for 4X4
%e ..0..0..0..0....0..1..0..1....0..1..1..0....0..1..1..1....1..1..1..0
%e ..0..0..0..0....1..0..0..1....1..1..0..0....0..1..0..1....1..1..0..0
%e ..0..1..0..1....1..0..0..1....0..0..0..1....1..1..1..0....0..1..1..0
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Apr 17 2011