A205985 Number of (n+1) X 8 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two clockwise edge increases.

1643538, 2482596, 6296976, 35107968, 279003648, 2260666464, 19410499584, 160992300384, 1323215405568, 11406249937152, 94660267282560, 778050772950528, 6706874963045376, 55660237162145280, 457493854494910464

Offset

1,1

Comments

Column 7 of A205986.

Links

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

Formula

Empirical: a(n) = 588*a(n-3) for n>12.

Example

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

Crossrefs

Cf. A205986.

Sequence in context: A255042 A255035 A256953 * A258953 A342429 A144127

Adjacent sequences: A205982 A205983 A205984 * A205986 A205987 A205988

Keyword

nonn

Author

R. H. Hardin, Feb 02 2012

Status

approved