A207595 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically

2, 16, 90, 441, 3915, 42025, 292600, 1982464, 21925800, 268730449, 2281109103, 19215781641, 242188032450, 3266593546384, 32361595709850, 320442399819025, 4434278073813775, 64468102969055809, 723471023371037040

Offset

1,1

Comments

Diagonal of A207599

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Example

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

Crossrefs

Sequence in context: A069440 A000431 A281982 * A253487 A207019 A207164

Adjacent sequences: A207592 A207593 A207594 * A207596 A207597 A207598

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved