A206751 Number of (n+1) X 8 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

114566336, 222273709440, 449274384195312, 920635927293402816, 1897470427514439403464, 3920972890172486310882016

Offset

1,1

Comments

Column 7 of A206752.

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A205169 A112018 A216010 * A206062 A157770 A195282

Adjacent sequences: A206748 A206749 A206750 * A206752 A206753 A206754

Keyword

nonn

Author

R. H. Hardin, Feb 12 2012

Status

approved