A205742 Number of 7X(n+1) 0..2 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.

160218, 97380, 526680, 4116576, 33070572, 276139080, 2333010360, 20252939448, 177288165936, 1586346079800, 14299637864256, 131222784826716, 1212181534620348, 11354938195735176, 106955852324919060

Offset

1,1

Comments

Row 6 of A205736.

Links

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

Example

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

Crossrefs

Sequence in context: A202936 A251971 A013897 * A206674 A205518 A141816

Adjacent sequences: A205739 A205740 A205741 * A205743 A205744 A205745

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved