A206749 Number of (n+1) X 6 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

1289472, 415429504, 140074119984, 47661729160320, 16261882009570952, 5553852508380267184, 1897470427514439403464, 648358115933748841946976, 221552861031935138886277472, 75709141973478718002175226936

Offset

1,1

Comments

Column 5 of A206752.

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

Some solutions for n=4:
..1..1..2..2..3..2....0..0..2..1..1..0....0..2..3..0..1..0....0..1..0..1..1..0
..1..0..1..1..2..3....2..2..2..2..1..0....1..3..2..3..0..1....3..0..1..2..1..1
..3..2..3..1..1..2....3..2..0..2..1..0....0..2..1..2..3..0....1..2..3..1..3..3
..1..0..2..3..3..0....0..3..2..0..3..1....1..0..2..2..3..0....1..2..2..3..2..2
..3..1..3..1..3..3....0..3..2..2..0..2....1..1..3..2..3..0....2..0..0..1..0..2

Crossrefs

Sequence in context: A205952 A205463 A247583 * A244563 A163681 A354560

Adjacent sequences: A206746 A206747 A206748 * A206750 A206751 A206752

Keyword

nonn

Author

R. H. Hardin, Feb 12 2012

Status

approved