A205638 Number of (n+1)X5 0..3 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.

198688, 5079336, 211610280, 11786800328, 727845846776, 46738310925116, 3046981775525932, 199800076245538628, 13132583312930472884, 864075508058435050420, 56880317083235486594612, 3745208397898734696110340

Offset

1,1

Comments

Column 4 of A205642.

Links

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

Example

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

Crossrefs

Sequence in context: A249358 A290780 A255782 * A031687 A234034 A154531

Adjacent sequences: A205635 A205636 A205637 * A205639 A205640 A205641

Keyword

nonn

Author

R. H. Hardin, Jan 29 2012

Status

approved