A205665 Number of 8X(n+1) 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.

92062852, 162377816, 939384668, 26605030292, 1092079388028, 54588666013136, 2904705131186012, 166238466407276348, 9834684014476639808, 601829146506334737576, 37463980727959096279020, 2369158930358310919375076

Offset

1,1

Comments

Row 7 of A205659.

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

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

Crossrefs

Sequence in context: A216009 A034643 A186051 * A205465 A117624 A147527

Adjacent sequences: A205662 A205663 A205664 * A205666 A205667 A205668

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved