A205657 Number of (n+1) X 7 0..3 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.

7854572, 76028256, 711793356, 10795687000, 183567605276, 2994560119488, 54588666013136, 946322990916328, 17957465680336828, 316121808578717168, 6072355548317464448, 107584942896241083216, 2075883483766878489344

Offset

1,1

Comments

Column 6 of A205659.

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

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

Crossrefs

Cf. A205659.

Sequence in context: A319809 A347424 A214194 * A206186 A205368 A235222

Adjacent sequences: A205654 A205655 A205656 * A205658 A205659 A205660

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved