A206682 Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases.

24336, 317736, 5747676, 84549024, 1533200232, 22293930744, 401233408020, 5846128911096, 105220089057252, 1533334835456760, 27601628613864552, 402223201377376200, 7240509893370945276, 105511280014998057264

Offset

1,1

Comments

Column 5 of A206685.

Links

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

Example

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

Crossrefs

Sequence in context: A156843 A156844 A174754 * A083621 A083622 A237207

Adjacent sequences: A206679 A206680 A206681 * A206683 A206684 A206685

Keyword

nonn

Author

R. H. Hardin, Feb 11 2012

Status

approved