A206667 Number of (n+1) X 8 0..2 arrays with every 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward and upward neighbors.

2046027, 38594841, 1770039198, 108688211619, 7050554283159, 464729380449429, 30831727837091925, 2051665393581595494, 136747710613864831857, 9121868183571809071275, 608769411415765774933107

Offset

1,1

Comments

Column 7 of A206668.

Links

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

Example

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

Crossrefs

Sequence in context: A272598 A190316 A034639 * A251512 A113568 A186915

Adjacent sequences: A206664 A206665 A206666 * A206668 A206669 A206670

Keyword

nonn

Author

R. H. Hardin, Feb 11 2012

Status

approved