A205767 Number of (n+1)X8 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

26672819, 23044169753, 20808476912916, 18792440902201504, 16933907492912073872, 15245666610881157061902, 13716254602126712440880420, 12336975902231287097446944284, 11094395430478243340473622599662

Offset

1,1

Comments

Column 7 of A205768

Links

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

Example

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

Crossrefs

Sequence in context: A120410 A246225 A151622 * A086129 A121109 A046518

Adjacent sequences: A205764 A205765 A205766 * A205768 A205769 A205770

Keyword

nonn

Author

R. H. Hardin Jan 30 2012

Status

approved