A208073 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 0 vertically

2, 16, 126, 2601, 139605, 17098225, 4412968520, 2580469555456, 3485691022698248, 10640054910525548209, 72722981173167013234455, 1123008691175260414001447481, 39309117808240836879763740048294

Offset

1,1

Comments

Diagonal of A208078

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A241466 A069868 A338186 * A022027 A322297 A338933

Adjacent sequences: A208070 A208071 A208072 * A208074 A208075 A208076

Keyword

nonn

Author

R. H. Hardin Feb 23 2012

Status

approved