A207482 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 1 0 vertically

2, 16, 82, 530, 4041, 26980, 268275, 2555724, 30415590, 441509828, 8373148373, 212120269939, 7313507695094, 322966671937819, 18599518847838594, 1383707197762948671, 137553485485585731530, 16701189911469748208243

Offset

1,1

Comments

Diagonal of A207488

Links

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

Example

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

Crossrefs

Sequence in context: A234004 A053587 A052346 * A207880 A207263 A207757

Adjacent sequences: A207479 A207480 A207481 * A207483 A207484 A207485

Keyword

nonn

Author

R. H. Hardin Feb 18 2012

Status

approved