A189257 Number of n X n binary arrays without the pattern 0 0 1 diagonally, antidiagonally or horizontally

2, 16, 280, 8900, 552752, 68635317, 17747766886, 9421503162646, 10606582683139102, 24593238398265693575, 121227430181311808878846, 1234571538047080619811567488, 26705899629138438568650919545084

Offset

1,1

Comments

Diagonal of A189264

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions for 3X3
..0..1..1....1..0..1....1..1..0....1..1..0....1..1..0....1..1..1....0..1..1
..1..1..0....1..0..1....1..0..1....0..0..0....0..1..1....0..0..0....0..1..1
..1..1..1....0..1..0....0..1..1....0..0..0....1..0..0....1..1..0....1..1..0

Crossrefs

Sequence in context: A217816 A000182 A009764 * A227674 A102599 A123744

Adjacent sequences: A189254 A189255 A189256 * A189258 A189259 A189260

Keyword

nonn

Author

R. H. Hardin Apr 19 2011

Status

approved