A206086 Number of (n+1) X (n+1) 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

81, 780, 4560, 48816, 516912, 10584000, 408445632, 17222950080, 1397673066240, 214644729219840, 36193471662355200, 11735368648637414400, 7204350072147674803200, 4859051673972177459072000

Offset

1,1

Comments

Diagonal of A206094.

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Sequence in context: A295233 A271829 A066431 * A356534 A224002 A253461

Adjacent sequences: A206083 A206084 A206085 * A206087 A206088 A206089

Keyword

nonn

Author

R. H. Hardin, Feb 03 2012

Status

approved