A205656 Number of (n+1)X6 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.

986388, 7919128, 57716364, 639426584, 7578064080, 88431310744, 1092079388028, 13465529402424, 172083987692176, 2147939536254768, 27674881330828524, 347439396017429976, 4493096435992372036, 56517849184020808768

Offset

1,1

Comments

Column 5 of A205659.

Links

R. H. Hardin, Table of n, a(n) for n = 1..115

Example

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

Crossrefs

Sequence in context: A344038 A250859 A251450 * A206185 A205367 A328288

Adjacent sequences: A205653 A205654 A205655 * A205657 A205658 A205659

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved