A184647 Number of (n+2)X4 0..3 arrays with each 3X3 subblock having a positive determinant

3745509, 398829619, 40374310135, 3941878848972, 398138249828378, 39962151945685497, 3975989966207625128, 398772531392899582485, 39987193655119991432064, 3990964696857966996964418

Offset

1,1

Comments

Column 2 of A184649

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Example

Some solutions for 6X4
..0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..0
..1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1
..0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0
..1..0..1..0....0..0..1..1....1..0..1..0....0..0..1..2....2..0..1..0
..2..1..1..3....1..1..0..3....3..1..0..1....1..0..0..3....2..1..0..3
..1..3..1..3....0..1..1..2....1..2..2..0....0..2..2..3....2..2..2..1

Crossrefs

Sequence in context: A254489 A253861 A114683 * A233753 A333744 A127879

Adjacent sequences: A184644 A184645 A184646 * A184648 A184649 A184650

Keyword

nonn

Author

R. H. Hardin Jan 18 2011

Status

approved