

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.


1



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



