A207448 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically

2, 16, 90, 760, 5200, 46956, 370734, 3599104, 31807710, 329885620, 3198732768, 35206521816, 369188811082, 4287997640080, 48104913781890, 586813738039904, 6984278125524784, 89124296743065348, 1118012637781250310

Offset

1,1

Comments

Diagonal of A207453

Links

R, H. Hardin, Table of n, a(n) for n = 1..39

Example

Some solutions for n=5
..0..1..1..1..1....0..1..1..1..1....0..1..0..1..0....1..0..1..1..1
..0..1..0..1..1....0..1..0..1..0....1..1..0..1..0....1..0..1..1..1
..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....1..0..1..0..0
..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....1..0..1..0..0
..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....1..0..1..0..0

Crossrefs

Sequence in context: A207019 A207164 A208113 * A207362 A208008 A208550

Adjacent sequences: A207445 A207446 A207447 * A207449 A207450 A207451

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved