A184646 Number of (n+2)X3 0..3 arrays with each 3X3 subblock having a positive determinant

106449, 3745509, 127914873, 4349714604, 148865535558, 5086456344189, 173770575972936, 5938271620589823, 202911936134261004, 6933513869040543390, 236921565938349758076, 8095693393330933416858, 276632675670908357073564

Offset

1,1

Comments

Column 1 of A184649

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4X3
..0..0..2....0..0..2....0..0..2....0..0..1....0..0..2....0..0..1....0..0..2
..2..1..1....2..1..1....2..1..1....2..0..0....2..1..1....2..1..1....1..0..1
..3..3..3....2..3..0....0..3..1....0..3..0....1..3..3....3..2..3....2..1..0
..1..0..3....1..3..3....0..1..1....3..1..2....2..1..2....2..0..3....3..2..1

Crossrefs

Sequence in context: A252775 A210410 A184649 * A237542 A237081 A253404

Adjacent sequences: A184643 A184644 A184645 * A184647 A184648 A184649

Keyword

nonn

Author

R. H. Hardin Jan 18 2011

Status

approved