A207362 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.

2, 16, 90, 784, 5856, 42849, 353808, 2792241, 21195317, 182223001, 1372615690, 11550015841, 91115397450, 745461286801, 5965914998428, 49005684164836, 389634565985060, 3219980044337424

Offset

1,1

Comments

Diagonal of A207368.

Links

Table of n, a(n) for n=1..18.

Example

Some solutions for n=4
..1..1..1..1....1..0..1..0....0..1..0..1....1..1..0..1....1..1..0..1
..0..0..1..0....0..0..1..0....0..1..0..0....1..0..0..1....0..0..1..0
..0..0..1..0....0..0..1..0....0..1..0..0....0..1..0..0....0..1..0..1
..0..0..1..0....0..0..1..0....0..1..0..0....1..0..0..1....0..0..1..0

Crossrefs

Cf. A207368.

Sequence in context: A207164 A208113 A207448 * A208008 A208550 A214824

Adjacent sequences: A207359 A207360 A207361 * A207363 A207364 A207365

Keyword

nonn

Author

R. H. Hardin, Feb 17 2012

Status

approved