A206891 Number of 5Xn 0..1 arrays avoiding 0 1 0 horizontally and 1 0 0 vertically.

20, 400, 4792, 51800, 607043, 7354488, 88342972, 1052865902, 12550021410, 149829237791, 1789228772267, 21361035307546, 254996432939040, 3044109171852296, 36341089959264948, 433845306322806048

Offset

1,1

Comments

Row 5 of A206889

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A188519 A189260 A224174 * A188759 A223866 A207091

Adjacent sequences: A206888 A206889 A206890 * A206892 A206893 A206894

Keyword

nonn

Author

R. H. Hardin, Feb 13 2012

Status

approved