A205763 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors

8659, 274013, 9909258, 375857889, 14312320196, 545700470559, 20808476912916, 793486314120669, 30257997968098894, 1153827416366199522, 43998894299268852777, 1677809126003982433476, 63979878224491463514492

Offset

1,1

Comments

Column 3 of A205768

Links

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

Example

Some solutions for 5X5
..1..0..1..2....3..2..2..2....0..1..3..2....2..0..3..3....1..0..1..3
..1..1..1..1....2..1..0..3....3..1..0..3....0..2..1..0....1..1..1..1
..0..1..2..1....3..2..1..0....2..2..1..0....2..1..2..1....2..3..1..3
..1..1..1..1....0..3..2..1....0..3..2..1....3..2..0..2....3..3..3..3
..0..1..2..0....1..0..3..2....3..1..3..2....2..1..1..0....1..2..3..1

Crossrefs

Sequence in context: A205732 A205913 A205905 * A253617 A203737 A214487

Adjacent sequences: A205760 A205761 A205762 * A205764 A205765 A205766

Keyword

nonn

Author

R. H. Hardin Jan 30 2012

Status

approved