A209645 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically.

2, 16, 102, 630, 4690, 34012, 287140, 2364992, 22028490, 200930125, 2026692954, 20118254688, 217071252489, 2316174126448, 26506083938686, 301219138880440, 3632894429145798, 43657425153387876, 552138493209771090

Offset

1,1

Comments

Diagonal of A209650

Links

R. H. Hardin, Table of n, a(n) for n = 1..38

Example

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

Crossrefs

Sequence in context: A361814 A032260 A197800 * A207062 A207398 A207699

Adjacent sequences: A209642 A209643 A209644 * A209646 A209647 A209648

Keyword

nonn

Author

R. H. Hardin, Mar 11 2012

Status

approved