A209219 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.

2, 16, 60, 196, 900, 5476, 38232, 287296, 3132576, 37625956, 515992736, 9773299600, 197179936872, 5340055452736, 166631085360000, 6057724646680996, 305548384194976300, 15689243192533764624, 1137621414073872082528

Offset

1,1

Comments

Diagonal of A209224

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

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

Crossrefs

Sequence in context: A206980 A357816 A170991 * A207688 A208495 A207583

Adjacent sequences: A209216 A209217 A209218 * A209220 A209221 A209222

Keyword

nonn

Author

R. H. Hardin, Mar 06 2012

Status

approved