A205637 Number of (n+1)X4 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.

21416, 377568, 8381936, 211610280, 5747728044, 163624211124, 4782966551464, 141848199078560, 4239132966006036, 127198372687892564, 3824751018996865512, 115134519419940813340, 3467848836579089353588, 104483428801256201255868

Offset

1,1

Comments

Column 3 of A205642.

Links

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

Example

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

Crossrefs

Sequence in context: A083361 A236661 A086477 * A255090 A237409 A252102

Adjacent sequences: A205634 A205635 A205636 * A205638 A205639 A205640

Keyword

nonn

Author

R. H. Hardin, Jan 29 2012

Status

approved