A206187 Number of (n+1) X 8 0..3 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.

62623348, 5614757320, 2345626036136, 1565902419680820, 1078848431799509828, 747343697917253418576

Offset

1,1

Comments

Column 7 of A206188.

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=4:
..1..1..3..1..1..3..1..0....0..1..0..1..1..0..1..0....1..3..2..1..3..0..2..2
..0..2..1..3..2..1..0..2....0..0..0..1..2..0..0..0....2..2..2..1..3..0..2..1
..0..0..1..2..2..3..0..1....3..3..0..1..2..3..3..3....3..1..1..1..3..0..2..2
..3..1..0..1..3..0..1..0....2..1..0..3..3..2..1..0....0..0..0..1..3..0..0..0
..2..2..1..0..0..2..0..1....1..1..0..3..0..2..1..0....1..3..0..1..3..3..3..0

Crossrefs

Sequence in context: A203943 A125063 A205658 * A205369 A157855 A017539

Adjacent sequences: A206184 A206185 A206186 * A206188 A206189 A206190

Keyword

nonn

Author

R. H. Hardin, Feb 04 2012

Status

approved