A189910 Number of 8Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

177, 31329, 5545233, 354894796, 22333076803, 1435483321366, 94632691298302, 6207537762978575, 401408206411689570, 25850136024684855135

Offset

1,1

Comments

Row 8 of A189905

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for 8X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....1..0..0..0....0..1..0..1....0..1..1..1
..0..0..0..0....1..0..0..0....0..0..0..0....0..0..1..0....0..0..0..0
..0..1..1..1....0..1..0..1....1..0..0..0....0..1..0..1....1..0..0..1
..0..0..0..0....0..0..1..0....1..1..0..0....1..0..0..1....0..1..0..0
..0..0..0..0....0..0..0..0....0..0..1..0....0..1..0..0....0..0..1..0
..0..0..0..0....1..0..0..0....1..1..0..0....0..0..1..0....1..0..0..1

Crossrefs

Sequence in context: A052461 A173375 A069398 * A189904 A189160 A053018

Adjacent sequences: A189907 A189908 A189909 * A189911 A189912 A189913

Keyword

nonn

Author

R. H. Hardin May 01 2011

Status

approved