A206673 Number of (n+1) X 6 0..2 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors.

35577, 243432, 1941084, 14200242, 117968049, 968502540, 8557823793, 75470698086, 693294850371, 6361771672926, 59801818435704, 560390027071656, 5336780502759381, 50575162079966328, 485167441500518109

Offset

1,1

Comments

Column 5 of A206676.

Links

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

Example

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

Crossrefs

Sequence in context: A203337 A184002 A205741 * A205517 A204666 A163680

Adjacent sequences: A206670 A206671 A206672 * A206674 A206675 A206676

Keyword

nonn

Author

R. H. Hardin, Feb 11 2012

Status

approved