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A189152
Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally
0
2, 16, 512, 37976, 8210464, 4708773306, 6787471566616, 25828698626846656, 247502169348575094540, 6064620415913633106142608
OFFSET
1,1
COMMENTS
Diagonal of A189161
EXAMPLE
Some solutions for 4X4
..0..0..0..0....0..1..0..1....0..1..1..0....0..1..1..1....1..1..1..0
..0..0..0..0....1..0..0..1....1..1..0..0....0..1..0..1....1..1..0..0
..0..1..0..1....1..0..0..1....0..0..0..1....1..1..1..0....0..1..1..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..1..0
CROSSREFS
Sequence in context: A189899 A189335 A189773 * A265015 A267728 A063387
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 17 2011
STATUS
approved