A205664 Number of 7X(n+1) 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.

10876432, 23019504, 142040528, 3024213232, 88431310744, 2994560119488, 106351019923768, 3947775200832256, 149503185538394128, 5763112909967382456, 223893620074913870560, 8755461346870905553088, 343348919507562739830432

Offset

1,1

Comments

Row 6 of A205659.

Links

R. H. Hardin, Table of n, a(n) for n = 1..59

Example

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

Crossrefs

Sequence in context: A214245 A233621 A151909 * A205953 A205464 A374779

Adjacent sequences: A205661 A205662 A205663 * A205665 A205666 A205667

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved