A205639 Number of (n+1)X6 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.

1843744, 69574220, 5747728044, 727845846776, 101664965477840, 14510023537151756, 2083971490096234516, 299992506477880869048, 43228355222030578943828, 6232381687781141483382068

Offset

1,1

Comments

Column 5 of A205642.

Links

R. H. Hardin, Table of n, a(n) for n = 1..82

Example

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

Crossrefs

Sequence in context: A249211 A244074 A204951 * A269117 A202469 A346742

Adjacent sequences: A205636 A205637 A205638 * A205640 A205641 A205642

Keyword

nonn

Author

R. H. Hardin, Jan 29 2012

Status

approved