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