A207798 Number of (n+1) X 8 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an unequal number of clockwise and counterclockwise edge increases.

141647296, 56368726448, 30836924266632, 16680713033508736, 9906634826573197984

Offset

1,1

Comments

Column 7 of A207799.

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A075130 A202280 A034611 * A204806 A186174 A224637

Adjacent sequences: A207795 A207796 A207797 * A207799 A207800 A207801

Keyword

nonn

Author

R. H. Hardin Feb 20 2012

Status

approved