A205915 Number of (n+1) X 7 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.

218034, 2554848, 93488811, 3820547082, 157611325827, 6566654061039, 274342874332980, 11488530154756449, 481501347104927403, 20193219305106753600, 847089560605594813119, 35541367887133558923699

Offset

1,1

Comments

Column 6 of A205917.

Links

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

Example

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

Crossrefs

Sequence in context: A078520 A019291 A205734 * A205907 A157377 A090873

Adjacent sequences: A205912 A205913 A205914 * A205916 A205917 A205918

Keyword

nonn

Author

R. H. Hardin, Feb 01 2012

Status

approved