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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.
1
2046027, 38594841, 1770039198, 108688211619, 7050554283159, 464729380449429, 30831727837091925, 2051665393581595494, 136747710613864831857, 9121868183571809071275, 608769411415765774933107
OFFSET
1,1
COMMENTS
Column 7 of A206668.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 11 2012
STATUS
approved