A205655 Number of (n+1)X5 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.

124048, 839872, 5016144, 41013960, 353779964, 3024213232, 26605030292, 240164548160, 2196863266988, 20067825935472, 184418956321412, 1693587495714136, 15615412887393200, 143611906940924648

Offset

1,1

Comments

Column 4 of A205659.

Links

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

Example

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

Crossrefs

Sequence in context: A049358 A245682 A237322 * A206184 A205366 A185992

Adjacent sequences: A205652 A205653 A205654 * A205656 A205657 A205658

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved