A208137 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically

2, 16, 108, 900, 6300, 50176, 352800, 2722500, 19111950, 144288144, 1010017008, 7505103424, 52382558592, 384598425600, 2677165603200, 19473033306276, 135229397960250, 976281270250000, 6765629202832500, 48545357372612100

Offset

1,1

Comments

Diagonal of A208142

Links

R. H. Hardin, Table of n, a(n) for n = 1..70

Example

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

Crossrefs

Sequence in context: A366635 A193217 A329550 * A207435 A301940 A359758

Adjacent sequences: A208134 A208135 A208136 * A208138 A208139 A208140

Keyword

nonn

Author

R. H. Hardin Feb 23 2012

Status

approved